Commit | Line | Data |
---|---|---|
2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
6dc3064a | 20 | #include <inttypes.h> |
2f77fc4b DG |
21 | #include <urcu/list.h> |
22 | #include <urcu/uatomic.h> | |
23 | ||
24 | #include <common/defaults.h> | |
25 | #include <common/common.h> | |
26 | #include <common/sessiond-comm/sessiond-comm.h> | |
27 | #include <common/relayd/relayd.h> | |
10a50311 | 28 | #include <common/utils.h> |
2f77fc4b DG |
29 | |
30 | #include "channel.h" | |
31 | #include "consumer.h" | |
32 | #include "event.h" | |
8782cc74 | 33 | #include "health-sessiond.h" |
2f77fc4b DG |
34 | #include "kernel.h" |
35 | #include "kernel-consumer.h" | |
36 | #include "lttng-sessiond.h" | |
37 | #include "utils.h" | |
834978fd | 38 | #include "syscall.h" |
2f77fc4b DG |
39 | |
40 | #include "cmd.h" | |
41 | ||
42 | /* | |
43 | * Used to keep a unique index for each relayd socket created where this value | |
44 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
45 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
46 | * held. | |
2f77fc4b | 47 | */ |
d88aee68 DG |
48 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
49 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 50 | |
18a720cd MD |
51 | /* |
52 | * Both functions below are special case for the Kernel domain when | |
53 | * enabling/disabling all events. | |
54 | */ | |
55 | static | |
56 | int enable_kevent_all(struct ltt_session *session, | |
57 | struct lttng_domain *domain, char *channel_name, | |
58 | struct lttng_event *event, | |
59 | char *filter_expression, | |
60 | struct lttng_filter_bytecode *filter, int wpipe); | |
61 | static | |
62 | int disable_kevent_all(struct ltt_session *session, int domain, | |
63 | char *channel_name, | |
64 | struct lttng_event *event); | |
65 | ||
2f77fc4b DG |
66 | /* |
67 | * Create a session path used by list_lttng_sessions for the case that the | |
68 | * session consumer is on the network. | |
69 | */ | |
70 | static int build_network_session_path(char *dst, size_t size, | |
71 | struct ltt_session *session) | |
72 | { | |
73 | int ret, kdata_port, udata_port; | |
74 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
75 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
76 | ||
77 | assert(session); | |
78 | assert(dst); | |
79 | ||
80 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
81 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
82 | ||
83 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
84 | ||
85 | if (session->kernel_session && session->kernel_session->consumer) { | |
86 | kuri = &session->kernel_session->consumer->dst.net.control; | |
87 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
88 | } | |
89 | ||
90 | if (session->ust_session && session->ust_session->consumer) { | |
91 | uuri = &session->ust_session->consumer->dst.net.control; | |
92 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
93 | } | |
94 | ||
95 | if (uuri == NULL && kuri == NULL) { | |
96 | uri = &session->consumer->dst.net.control; | |
97 | kdata_port = session->consumer->dst.net.data.port; | |
98 | } else if (kuri && uuri) { | |
99 | ret = uri_compare(kuri, uuri); | |
100 | if (ret) { | |
101 | /* Not Equal */ | |
102 | uri = kuri; | |
103 | /* Build uuri URL string */ | |
104 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
105 | if (ret < 0) { | |
106 | goto error; | |
107 | } | |
108 | } else { | |
109 | uri = kuri; | |
110 | } | |
111 | } else if (kuri && uuri == NULL) { | |
112 | uri = kuri; | |
113 | } else if (uuri && kuri == NULL) { | |
114 | uri = uuri; | |
115 | } | |
116 | ||
117 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
118 | if (ret < 0) { | |
119 | goto error; | |
120 | } | |
121 | ||
9aa9f900 DG |
122 | /* |
123 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
124 | * to print. | |
125 | */ | |
9d035200 | 126 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
127 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
128 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
129 | } else { | |
9aa9f900 | 130 | int dport; |
bef08707 | 131 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
132 | dport = kdata_port; |
133 | } else { | |
134 | /* No kernel URI, use the UST port. */ | |
135 | dport = udata_port; | |
136 | } | |
137 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
138 | } |
139 | ||
140 | error: | |
141 | return ret; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Fill lttng_channel array of all channels. | |
146 | */ | |
147 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
148 | struct lttng_channel *channels) | |
149 | { | |
150 | int i = 0; | |
151 | struct ltt_kernel_channel *kchan; | |
152 | ||
153 | DBG("Listing channels for session %s", session->name); | |
154 | ||
155 | switch (domain) { | |
156 | case LTTNG_DOMAIN_KERNEL: | |
157 | /* Kernel channels */ | |
158 | if (session->kernel_session != NULL) { | |
159 | cds_list_for_each_entry(kchan, | |
160 | &session->kernel_session->channel_list.head, list) { | |
161 | /* Copy lttng_channel struct to array */ | |
162 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
163 | channels[i].enabled = kchan->enabled; | |
164 | i++; | |
165 | } | |
166 | } | |
167 | break; | |
168 | case LTTNG_DOMAIN_UST: | |
169 | { | |
170 | struct lttng_ht_iter iter; | |
171 | struct ltt_ust_channel *uchan; | |
172 | ||
e7fe706f | 173 | rcu_read_lock(); |
2f77fc4b DG |
174 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
175 | &iter.iter, uchan, node.node) { | |
176 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
177 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
178 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
179 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
180 | channels[i].attr.switch_timer_interval = | |
181 | uchan->attr.switch_timer_interval; | |
182 | channels[i].attr.read_timer_interval = | |
183 | uchan->attr.read_timer_interval; | |
184 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
185 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
186 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
187 | switch (uchan->attr.output) { |
188 | case LTTNG_UST_MMAP: | |
189 | default: | |
190 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
191 | break; | |
192 | } | |
193 | i++; | |
194 | } | |
e7fe706f | 195 | rcu_read_unlock(); |
2f77fc4b DG |
196 | break; |
197 | } | |
198 | default: | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
3c6a091f | 203 | /* |
022d91ba | 204 | * Create a list of agent domain events. |
3c6a091f DG |
205 | * |
206 | * Return number of events in list on success or else a negative value. | |
207 | */ | |
022d91ba | 208 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
209 | struct lttng_event **events) |
210 | { | |
211 | int i = 0, ret = 0; | |
212 | unsigned int nb_event = 0; | |
022d91ba | 213 | struct agent_event *event; |
3c6a091f DG |
214 | struct lttng_event *tmp_events; |
215 | struct lttng_ht_iter iter; | |
216 | ||
022d91ba | 217 | assert(agt); |
3c6a091f DG |
218 | assert(events); |
219 | ||
022d91ba | 220 | DBG3("Listing agent events"); |
3c6a091f | 221 | |
d515217c | 222 | rcu_read_lock(); |
022d91ba | 223 | nb_event = lttng_ht_get_count(agt->events); |
d515217c | 224 | rcu_read_unlock(); |
3c6a091f DG |
225 | if (nb_event == 0) { |
226 | ret = nb_event; | |
227 | goto error; | |
228 | } | |
229 | ||
230 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
231 | if (!tmp_events) { | |
022d91ba | 232 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
233 | ret = -LTTNG_ERR_FATAL; |
234 | goto error; | |
235 | } | |
236 | ||
237 | rcu_read_lock(); | |
022d91ba | 238 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
239 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
240 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
241 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
242 | tmp_events[i].loglevel = event->loglevel; |
243 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
244 | i++; |
245 | } | |
246 | rcu_read_unlock(); | |
247 | ||
248 | *events = tmp_events; | |
249 | ret = nb_event; | |
250 | ||
251 | error: | |
252 | assert(nb_event == i); | |
253 | return ret; | |
254 | } | |
255 | ||
2f77fc4b DG |
256 | /* |
257 | * Create a list of ust global domain events. | |
258 | */ | |
259 | static int list_lttng_ust_global_events(char *channel_name, | |
260 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
261 | { | |
262 | int i = 0, ret = 0; | |
263 | unsigned int nb_event = 0; | |
264 | struct lttng_ht_iter iter; | |
265 | struct lttng_ht_node_str *node; | |
266 | struct ltt_ust_channel *uchan; | |
267 | struct ltt_ust_event *uevent; | |
268 | struct lttng_event *tmp; | |
269 | ||
270 | DBG("Listing UST global events for channel %s", channel_name); | |
271 | ||
272 | rcu_read_lock(); | |
273 | ||
274 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
275 | node = lttng_ht_iter_get_node_str(&iter); | |
276 | if (node == NULL) { | |
f73fabfd | 277 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
278 | goto error; |
279 | } | |
280 | ||
281 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
282 | ||
283 | nb_event += lttng_ht_get_count(uchan->events); | |
284 | ||
285 | if (nb_event == 0) { | |
286 | ret = nb_event; | |
287 | goto error; | |
288 | } | |
289 | ||
290 | DBG3("Listing UST global %d events", nb_event); | |
291 | ||
292 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
293 | if (tmp == NULL) { | |
f73fabfd | 294 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
295 | goto error; |
296 | } | |
297 | ||
298 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
299 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
300 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
301 | tmp[i].enabled = uevent->enabled; | |
302 | ||
303 | switch (uevent->attr.instrumentation) { | |
304 | case LTTNG_UST_TRACEPOINT: | |
305 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
306 | break; | |
307 | case LTTNG_UST_PROBE: | |
308 | tmp[i].type = LTTNG_EVENT_PROBE; | |
309 | break; | |
310 | case LTTNG_UST_FUNCTION: | |
311 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
312 | break; | |
313 | } | |
314 | ||
315 | tmp[i].loglevel = uevent->attr.loglevel; | |
316 | switch (uevent->attr.loglevel_type) { | |
317 | case LTTNG_UST_LOGLEVEL_ALL: | |
318 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
319 | break; | |
320 | case LTTNG_UST_LOGLEVEL_RANGE: | |
321 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
322 | break; | |
323 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
324 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
325 | break; | |
326 | } | |
327 | if (uevent->filter) { | |
328 | tmp[i].filter = 1; | |
329 | } | |
4634f12e JI |
330 | if (uevent->exclusion) { |
331 | tmp[i].exclusion = 1; | |
332 | } | |
2f77fc4b DG |
333 | i++; |
334 | } | |
335 | ||
336 | ret = nb_event; | |
337 | *events = tmp; | |
338 | ||
339 | error: | |
340 | rcu_read_unlock(); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Fill lttng_event array of all kernel events in the channel. | |
346 | */ | |
347 | static int list_lttng_kernel_events(char *channel_name, | |
348 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
349 | { | |
350 | int i = 0, ret; | |
351 | unsigned int nb_event; | |
352 | struct ltt_kernel_event *event; | |
353 | struct ltt_kernel_channel *kchan; | |
354 | ||
355 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
356 | if (kchan == NULL) { | |
f73fabfd | 357 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
358 | goto error; |
359 | } | |
360 | ||
361 | nb_event = kchan->event_count; | |
362 | ||
363 | DBG("Listing events for channel %s", kchan->channel->name); | |
364 | ||
365 | if (nb_event == 0) { | |
834978fd DG |
366 | *events = NULL; |
367 | goto syscall; | |
2f77fc4b DG |
368 | } |
369 | ||
370 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
371 | if (*events == NULL) { | |
f73fabfd | 372 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
373 | goto error; |
374 | } | |
375 | ||
376 | /* Kernel channels */ | |
377 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
378 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
379 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
380 | (*events)[i].enabled = event->enabled; | |
381 | ||
382 | switch (event->event->instrumentation) { | |
383 | case LTTNG_KERNEL_TRACEPOINT: | |
384 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
385 | break; | |
2f77fc4b | 386 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
387 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
388 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
389 | sizeof(struct lttng_kernel_kprobe)); | |
390 | break; | |
391 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
392 | (*events)[i].type = LTTNG_EVENT_PROBE; |
393 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
394 | sizeof(struct lttng_kernel_kprobe)); | |
395 | break; | |
396 | case LTTNG_KERNEL_FUNCTION: | |
397 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
398 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
399 | sizeof(struct lttng_kernel_function)); | |
400 | break; | |
401 | case LTTNG_KERNEL_NOOP: | |
402 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
403 | break; | |
404 | case LTTNG_KERNEL_SYSCALL: | |
405 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
406 | break; | |
407 | case LTTNG_KERNEL_ALL: | |
408 | assert(0); | |
409 | break; | |
410 | } | |
411 | i++; | |
412 | } | |
413 | ||
834978fd DG |
414 | syscall: |
415 | if (syscall_table) { | |
416 | ssize_t new_size; | |
417 | ||
418 | new_size = syscall_list_channel(kchan, events, nb_event); | |
419 | if (new_size < 0) { | |
420 | free(events); | |
421 | ret = -new_size; | |
422 | goto error; | |
423 | } | |
424 | nb_event = new_size; | |
425 | } | |
426 | ||
2f77fc4b DG |
427 | return nb_event; |
428 | ||
429 | error: | |
f73fabfd DG |
430 | /* Negate the error code to differentiate the size from an error */ |
431 | return -ret; | |
2f77fc4b DG |
432 | } |
433 | ||
434 | /* | |
435 | * Add URI so the consumer output object. Set the correct path depending on the | |
436 | * domain adding the default trace directory. | |
437 | */ | |
438 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
439 | struct lttng_uri *uri, int domain, const char *session_name) | |
440 | { | |
f73fabfd | 441 | int ret = LTTNG_OK; |
2f77fc4b DG |
442 | const char *default_trace_dir; |
443 | ||
444 | assert(uri); | |
445 | ||
446 | if (consumer == NULL) { | |
447 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 448 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
449 | goto error; |
450 | } | |
451 | ||
452 | switch (domain) { | |
453 | case LTTNG_DOMAIN_KERNEL: | |
454 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
455 | break; | |
456 | case LTTNG_DOMAIN_UST: | |
457 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
458 | break; | |
459 | default: | |
460 | /* | |
461 | * This case is possible is we try to add the URI to the global tracing | |
462 | * session consumer object which in this case there is no subdir. | |
463 | */ | |
464 | default_trace_dir = ""; | |
465 | } | |
466 | ||
467 | switch (uri->dtype) { | |
468 | case LTTNG_DST_IPV4: | |
469 | case LTTNG_DST_IPV6: | |
470 | DBG2("Setting network URI to consumer"); | |
471 | ||
df75acac DG |
472 | if (consumer->type == CONSUMER_DST_NET) { |
473 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
474 | consumer->dst.net.control_isset) || |
475 | (uri->stype == LTTNG_STREAM_DATA && | |
476 | consumer->dst.net.data_isset)) { | |
df75acac DG |
477 | ret = LTTNG_ERR_URL_EXIST; |
478 | goto error; | |
479 | } | |
480 | } else { | |
481 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
482 | } |
483 | ||
df75acac DG |
484 | consumer->type = CONSUMER_DST_NET; |
485 | ||
2f77fc4b DG |
486 | /* Set URI into consumer output object */ |
487 | ret = consumer_set_network_uri(consumer, uri); | |
488 | if (ret < 0) { | |
a74934ba | 489 | ret = -ret; |
2f77fc4b DG |
490 | goto error; |
491 | } else if (ret == 1) { | |
492 | /* | |
493 | * URI was the same in the consumer so we do not append the subdir | |
494 | * again so to not duplicate output dir. | |
495 | */ | |
f86c9f4e | 496 | ret = LTTNG_OK; |
2f77fc4b DG |
497 | goto error; |
498 | } | |
499 | ||
500 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
501 | ret = consumer_set_subdir(consumer, session_name); | |
502 | if (ret < 0) { | |
f73fabfd | 503 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
504 | goto error; |
505 | } | |
506 | } | |
507 | ||
508 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
509 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
510 | strncat(consumer->subdir, default_trace_dir, |
511 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
512 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
513 | } | |
514 | ||
515 | break; | |
516 | case LTTNG_DST_PATH: | |
517 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
518 | memset(consumer->dst.trace_path, 0, | |
519 | sizeof(consumer->dst.trace_path)); | |
520 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
521 | sizeof(consumer->dst.trace_path)); | |
522 | /* Append default trace dir */ | |
523 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
524 | sizeof(consumer->dst.trace_path) - |
525 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
526 | /* Flag consumer as local. */ |
527 | consumer->type = CONSUMER_DST_LOCAL; | |
528 | break; | |
529 | } | |
530 | ||
a74934ba DG |
531 | ret = LTTNG_OK; |
532 | ||
2f77fc4b DG |
533 | error: |
534 | return ret; | |
535 | } | |
536 | ||
537 | /* | |
538 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
539 | */ | |
540 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
541 | { | |
542 | int ret = 0; | |
543 | struct lttng_ht_iter iter; | |
544 | struct consumer_socket *socket; | |
545 | ||
546 | assert(session); | |
547 | ||
e7fe706f DG |
548 | rcu_read_lock(); |
549 | ||
2f77fc4b DG |
550 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
551 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
552 | socket, node.node) { | |
2f77fc4b | 553 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 554 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
555 | pthread_mutex_unlock(socket->lock); |
556 | if (ret < 0) { | |
f73fabfd | 557 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
558 | goto error; |
559 | } | |
560 | } | |
561 | } | |
562 | ||
563 | error: | |
e7fe706f | 564 | rcu_read_unlock(); |
2f77fc4b DG |
565 | return ret; |
566 | } | |
567 | ||
568 | /* | |
569 | * Create a socket to the relayd using the URI. | |
570 | * | |
571 | * On success, the relayd_sock pointer is set to the created socket. | |
572 | * Else, it's stays untouched and a lttcomm error code is returned. | |
573 | */ | |
6151a90f JD |
574 | static int create_connect_relayd(struct lttng_uri *uri, |
575 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
576 | { |
577 | int ret; | |
6151a90f | 578 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 579 | |
6151a90f JD |
580 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
581 | RELAYD_VERSION_COMM_MINOR); | |
582 | if (!rsock) { | |
f73fabfd | 583 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
584 | goto error; |
585 | } | |
586 | ||
ffe60014 DG |
587 | /* |
588 | * Connect to relayd so we can proceed with a session creation. This call | |
589 | * can possibly block for an arbitrary amount of time to set the health | |
590 | * state to be in poll execution. | |
591 | */ | |
592 | health_poll_entry(); | |
6151a90f | 593 | ret = relayd_connect(rsock); |
ffe60014 | 594 | health_poll_exit(); |
2f77fc4b DG |
595 | if (ret < 0) { |
596 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 597 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
598 | goto free_sock; |
599 | } | |
600 | ||
601 | /* Create socket for control stream. */ | |
602 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
603 | DBG3("Creating relayd stream socket from URI"); | |
604 | ||
605 | /* Check relayd version */ | |
6151a90f | 606 | ret = relayd_version_check(rsock); |
2f77fc4b | 607 | if (ret < 0) { |
f73fabfd | 608 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
609 | goto close_sock; |
610 | } | |
611 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
612 | DBG3("Creating relayd data socket from URI"); | |
613 | } else { | |
614 | /* Command is not valid */ | |
615 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 616 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
617 | goto close_sock; |
618 | } | |
619 | ||
6151a90f | 620 | *relayd_sock = rsock; |
2f77fc4b | 621 | |
f73fabfd | 622 | return LTTNG_OK; |
2f77fc4b DG |
623 | |
624 | close_sock: | |
6151a90f JD |
625 | /* The returned value is not useful since we are on an error path. */ |
626 | (void) relayd_close(rsock); | |
2f77fc4b | 627 | free_sock: |
6151a90f | 628 | free(rsock); |
2f77fc4b DG |
629 | error: |
630 | return ret; | |
631 | } | |
632 | ||
633 | /* | |
634 | * Connect to the relayd using URI and send the socket to the right consumer. | |
635 | */ | |
6dc3064a | 636 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 637 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
638 | struct consumer_socket *consumer_sock, |
639 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
640 | { |
641 | int ret; | |
6151a90f | 642 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 643 | |
ffe60014 | 644 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 645 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 646 | if (ret != LTTNG_OK) { |
6151a90f | 647 | goto error; |
ffe60014 | 648 | } |
6151a90f | 649 | assert(rsock); |
ffe60014 | 650 | |
2f77fc4b | 651 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
652 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
653 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
654 | /* |
655 | * Increment net_seq_idx because we are about to transfer the | |
656 | * new relayd socket to the consumer. | |
d88aee68 | 657 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 658 | */ |
d88aee68 DG |
659 | consumer->net_seq_index = ++relayd_net_seq_idx; |
660 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
661 | } |
662 | ||
2f77fc4b | 663 | /* Send relayd socket to consumer. */ |
6151a90f | 664 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
665 | relayd_uri->stype, session_id, |
666 | session_name, hostname, session_live_timer); | |
2f77fc4b | 667 | if (ret < 0) { |
f73fabfd | 668 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
669 | goto close_sock; |
670 | } | |
671 | ||
c890b720 DG |
672 | /* Flag that the corresponding socket was sent. */ |
673 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 674 | consumer_sock->control_sock_sent = 1; |
c890b720 | 675 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 676 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
677 | } |
678 | ||
f73fabfd | 679 | ret = LTTNG_OK; |
2f77fc4b DG |
680 | |
681 | /* | |
682 | * Close socket which was dup on the consumer side. The session daemon does | |
683 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
684 | */ | |
685 | ||
686 | close_sock: | |
6151a90f JD |
687 | (void) relayd_close(rsock); |
688 | free(rsock); | |
2f77fc4b | 689 | |
6151a90f | 690 | error: |
ffe60014 DG |
691 | if (ret != LTTNG_OK) { |
692 | /* | |
d9078d0c DG |
693 | * The consumer output for this session should not be used anymore |
694 | * since the relayd connection failed thus making any tracing or/and | |
695 | * streaming not usable. | |
ffe60014 | 696 | */ |
d9078d0c | 697 | consumer->enabled = 0; |
ffe60014 | 698 | } |
2f77fc4b DG |
699 | return ret; |
700 | } | |
701 | ||
702 | /* | |
703 | * Send both relayd sockets to a specific consumer and domain. This is a | |
704 | * helper function to facilitate sending the information to the consumer for a | |
705 | * session. | |
706 | */ | |
6dc3064a | 707 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
708 | struct consumer_output *consumer, struct consumer_socket *sock, |
709 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 710 | { |
dda67f6c | 711 | int ret = LTTNG_OK; |
2f77fc4b | 712 | |
2f77fc4b | 713 | assert(consumer); |
6dc3064a | 714 | assert(sock); |
2f77fc4b | 715 | |
2f77fc4b | 716 | /* Sending control relayd socket. */ |
ffe60014 | 717 | if (!sock->control_sock_sent) { |
6dc3064a | 718 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
719 | &consumer->dst.net.control, consumer, sock, |
720 | session_name, hostname, session_live_timer); | |
c890b720 DG |
721 | if (ret != LTTNG_OK) { |
722 | goto error; | |
723 | } | |
2f77fc4b DG |
724 | } |
725 | ||
726 | /* Sending data relayd socket. */ | |
ffe60014 | 727 | if (!sock->data_sock_sent) { |
6dc3064a | 728 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
729 | &consumer->dst.net.data, consumer, sock, |
730 | session_name, hostname, session_live_timer); | |
c890b720 DG |
731 | if (ret != LTTNG_OK) { |
732 | goto error; | |
733 | } | |
2f77fc4b DG |
734 | } |
735 | ||
2f77fc4b DG |
736 | error: |
737 | return ret; | |
738 | } | |
739 | ||
740 | /* | |
741 | * Setup relayd connections for a tracing session. First creates the socket to | |
742 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
743 | * network. | |
744 | */ | |
ffe60014 | 745 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 746 | { |
f73fabfd | 747 | int ret = LTTNG_OK; |
2f77fc4b DG |
748 | struct ltt_ust_session *usess; |
749 | struct ltt_kernel_session *ksess; | |
750 | struct consumer_socket *socket; | |
751 | struct lttng_ht_iter iter; | |
752 | ||
753 | assert(session); | |
754 | ||
755 | usess = session->ust_session; | |
756 | ksess = session->kernel_session; | |
757 | ||
785d2d0d | 758 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 759 | |
e7fe706f DG |
760 | rcu_read_lock(); |
761 | ||
2f77fc4b DG |
762 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
763 | && usess->consumer->enabled) { | |
764 | /* For each consumer socket, send relayd sockets */ | |
765 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
766 | socket, node.node) { | |
2f77fc4b | 767 | pthread_mutex_lock(socket->lock); |
6dc3064a | 768 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
769 | usess->consumer, socket, |
770 | session->name, session->hostname, | |
771 | session->live_timer); | |
2f77fc4b | 772 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 773 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
774 | goto error; |
775 | } | |
6dc3064a DG |
776 | /* Session is now ready for network streaming. */ |
777 | session->net_handle = 1; | |
2f77fc4b DG |
778 | } |
779 | } | |
780 | ||
781 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
782 | && ksess->consumer->enabled) { | |
783 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
784 | socket, node.node) { | |
2f77fc4b | 785 | pthread_mutex_lock(socket->lock); |
6dc3064a | 786 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
787 | ksess->consumer, socket, |
788 | session->name, session->hostname, | |
789 | session->live_timer); | |
2f77fc4b | 790 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 791 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
792 | goto error; |
793 | } | |
6dc3064a DG |
794 | /* Session is now ready for network streaming. */ |
795 | session->net_handle = 1; | |
2f77fc4b DG |
796 | } |
797 | } | |
798 | ||
799 | error: | |
e7fe706f | 800 | rcu_read_unlock(); |
2f77fc4b DG |
801 | return ret; |
802 | } | |
803 | ||
9b6c7ec5 DG |
804 | /* |
805 | * Start a kernel session by opening all necessary streams. | |
806 | */ | |
807 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
808 | { | |
809 | int ret; | |
810 | struct ltt_kernel_channel *kchan; | |
811 | ||
812 | /* Open kernel metadata */ | |
07b86b52 | 813 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
814 | ret = kernel_open_metadata(ksess); |
815 | if (ret < 0) { | |
816 | ret = LTTNG_ERR_KERN_META_FAIL; | |
817 | goto error; | |
818 | } | |
819 | } | |
820 | ||
821 | /* Open kernel metadata stream */ | |
07b86b52 | 822 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
823 | ret = kernel_open_metadata_stream(ksess); |
824 | if (ret < 0) { | |
825 | ERR("Kernel create metadata stream failed"); | |
826 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
827 | goto error; | |
828 | } | |
829 | } | |
830 | ||
831 | /* For each channel */ | |
832 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
833 | if (kchan->stream_count == 0) { | |
834 | ret = kernel_open_channel_stream(kchan); | |
835 | if (ret < 0) { | |
836 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
837 | goto error; | |
838 | } | |
839 | /* Update the stream global counter */ | |
840 | ksess->stream_count_global += ret; | |
841 | } | |
842 | } | |
843 | ||
844 | /* Setup kernel consumer socket and send fds to it */ | |
845 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 846 | if (ret != 0) { |
9b6c7ec5 DG |
847 | ret = LTTNG_ERR_KERN_START_FAIL; |
848 | goto error; | |
849 | } | |
850 | ||
851 | /* This start the kernel tracing */ | |
852 | ret = kernel_start_session(ksess); | |
853 | if (ret < 0) { | |
854 | ret = LTTNG_ERR_KERN_START_FAIL; | |
855 | goto error; | |
856 | } | |
857 | ||
858 | /* Quiescent wait after starting trace */ | |
784303b0 | 859 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 860 | |
14fb1ebe | 861 | ksess->active = 1; |
9b6c7ec5 DG |
862 | |
863 | ret = LTTNG_OK; | |
864 | ||
865 | error: | |
866 | return ret; | |
867 | } | |
868 | ||
2f77fc4b DG |
869 | /* |
870 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
871 | */ | |
872 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
873 | char *channel_name) | |
874 | { | |
875 | int ret; | |
876 | struct ltt_ust_session *usess; | |
877 | ||
878 | usess = session->ust_session; | |
879 | ||
2223c96f DG |
880 | rcu_read_lock(); |
881 | ||
2f77fc4b DG |
882 | switch (domain) { |
883 | case LTTNG_DOMAIN_KERNEL: | |
884 | { | |
885 | ret = channel_kernel_disable(session->kernel_session, | |
886 | channel_name); | |
f73fabfd | 887 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
888 | goto error; |
889 | } | |
890 | ||
891 | kernel_wait_quiescent(kernel_tracer_fd); | |
892 | break; | |
893 | } | |
894 | case LTTNG_DOMAIN_UST: | |
895 | { | |
896 | struct ltt_ust_channel *uchan; | |
897 | struct lttng_ht *chan_ht; | |
898 | ||
899 | chan_ht = usess->domain_global.channels; | |
900 | ||
901 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
902 | if (uchan == NULL) { | |
f73fabfd | 903 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
904 | goto error; |
905 | } | |
906 | ||
7972aab2 | 907 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 908 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
909 | goto error; |
910 | } | |
911 | break; | |
912 | } | |
913 | #if 0 | |
914 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
915 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
916 | case LTTNG_DOMAIN_UST_PID: | |
917 | #endif | |
918 | default: | |
f73fabfd | 919 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
920 | goto error; |
921 | } | |
922 | ||
f73fabfd | 923 | ret = LTTNG_OK; |
2f77fc4b DG |
924 | |
925 | error: | |
2223c96f | 926 | rcu_read_unlock(); |
2f77fc4b DG |
927 | return ret; |
928 | } | |
929 | ||
930 | /* | |
931 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
932 | * | |
933 | * The wpipe arguments is used as a notifier for the kernel thread. | |
934 | */ | |
935 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 936 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
937 | { |
938 | int ret; | |
939 | struct ltt_ust_session *usess = session->ust_session; | |
940 | struct lttng_ht *chan_ht; | |
941 | ||
942 | assert(session); | |
943 | assert(attr); | |
7972aab2 | 944 | assert(domain); |
2f77fc4b DG |
945 | |
946 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
947 | ||
03b4fdcf DG |
948 | rcu_read_lock(); |
949 | ||
ecc48a90 JD |
950 | /* |
951 | * Don't try to enable a channel if the session has been started at | |
952 | * some point in time before. The tracer does not allow it. | |
953 | */ | |
8382cf6f | 954 | if (session->has_been_started) { |
ecc48a90 JD |
955 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
956 | goto error; | |
957 | } | |
958 | ||
959 | /* | |
960 | * If the session is a live session, remove the switch timer, the | |
961 | * live timer does the same thing but sends also synchronisation | |
962 | * beacons for inactive streams. | |
963 | */ | |
964 | if (session->live_timer > 0) { | |
965 | attr->attr.live_timer_interval = session->live_timer; | |
966 | attr->attr.switch_timer_interval = 0; | |
967 | } | |
968 | ||
33fbd469 DG |
969 | /* |
970 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
971 | * mode and with less than 2 subbuf so block it right away and send back an | |
972 | * invalid attribute error. | |
973 | */ | |
974 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
975 | ret = LTTNG_ERR_INVALID; | |
976 | goto error; | |
977 | } | |
978 | ||
7972aab2 | 979 | switch (domain->type) { |
2f77fc4b DG |
980 | case LTTNG_DOMAIN_KERNEL: |
981 | { | |
982 | struct ltt_kernel_channel *kchan; | |
983 | ||
2f77fc4b DG |
984 | kchan = trace_kernel_get_channel_by_name(attr->name, |
985 | session->kernel_session); | |
986 | if (kchan == NULL) { | |
987 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
988 | if (attr->name[0] != '\0') { |
989 | session->kernel_session->has_non_default_channel = 1; | |
990 | } | |
2f77fc4b DG |
991 | } else { |
992 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
993 | } | |
994 | ||
f73fabfd | 995 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
996 | goto error; |
997 | } | |
998 | ||
784303b0 | 999 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1000 | break; |
1001 | } | |
1002 | case LTTNG_DOMAIN_UST: | |
1003 | { | |
1004 | struct ltt_ust_channel *uchan; | |
1005 | ||
1006 | chan_ht = usess->domain_global.channels; | |
1007 | ||
1008 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1009 | if (uchan == NULL) { | |
7972aab2 | 1010 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1011 | if (attr->name[0] != '\0') { |
1012 | usess->has_non_default_channel = 1; | |
1013 | } | |
2f77fc4b | 1014 | } else { |
7972aab2 | 1015 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1016 | } |
1017 | break; | |
1018 | } | |
2f77fc4b | 1019 | default: |
f73fabfd | 1020 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1021 | goto error; |
1022 | } | |
1023 | ||
1024 | error: | |
2223c96f | 1025 | rcu_read_unlock(); |
2f77fc4b DG |
1026 | return ret; |
1027 | } | |
1028 | ||
1029 | ||
1030 | /* | |
1031 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1032 | */ | |
1033 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1034 | char *channel_name, |
1035 | struct lttng_event *event) | |
2f77fc4b DG |
1036 | { |
1037 | int ret; | |
6e911cad MD |
1038 | char *event_name; |
1039 | ||
18a720cd MD |
1040 | DBG("Disable event command for event \'%s\'", event->name); |
1041 | ||
6e911cad MD |
1042 | event_name = event->name; |
1043 | ||
1044 | if (event->loglevel_type || event->loglevel || event->enabled | |
1045 | || event->pid || event->filter || event->exclusion) { | |
1046 | return LTTNG_ERR_UNK; | |
1047 | } | |
18a720cd MD |
1048 | /* Special handling for kernel domain all events. */ |
1049 | if (domain == LTTNG_DOMAIN_KERNEL && !strcmp(event_name, "*")) { | |
1050 | return disable_kevent_all(session, domain, channel_name, event); | |
1051 | } | |
2f77fc4b | 1052 | |
2223c96f DG |
1053 | rcu_read_lock(); |
1054 | ||
2f77fc4b DG |
1055 | switch (domain) { |
1056 | case LTTNG_DOMAIN_KERNEL: | |
1057 | { | |
1058 | struct ltt_kernel_channel *kchan; | |
1059 | struct ltt_kernel_session *ksess; | |
1060 | ||
1061 | ksess = session->kernel_session; | |
1062 | ||
85076754 MD |
1063 | /* |
1064 | * If a non-default channel has been created in the | |
1065 | * session, explicitely require that -c chan_name needs | |
1066 | * to be provided. | |
1067 | */ | |
1068 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1069 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1070 | goto error; | |
1071 | } | |
1072 | ||
2f77fc4b DG |
1073 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1074 | if (kchan == NULL) { | |
f73fabfd | 1075 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1076 | goto error; |
1077 | } | |
1078 | ||
6e911cad MD |
1079 | switch (event->type) { |
1080 | case LTTNG_EVENT_ALL: | |
1081 | case LTTNG_EVENT_TRACEPOINT: | |
1082 | ret = event_kernel_disable_tracepoint(kchan, event_name); | |
1083 | if (ret != LTTNG_OK) { | |
1084 | goto error; | |
1085 | } | |
1086 | break; | |
1087 | case LTTNG_EVENT_SYSCALL: | |
1088 | ret = event_kernel_disable_syscall(kchan, event_name); | |
e2b957af MD |
1089 | if (ret != LTTNG_OK) { |
1090 | goto error; | |
1091 | } | |
6e911cad MD |
1092 | break; |
1093 | default: | |
1094 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1095 | goto error; |
1096 | } | |
1097 | ||
1098 | kernel_wait_quiescent(kernel_tracer_fd); | |
1099 | break; | |
1100 | } | |
1101 | case LTTNG_DOMAIN_UST: | |
1102 | { | |
1103 | struct ltt_ust_channel *uchan; | |
1104 | struct ltt_ust_session *usess; | |
1105 | ||
1106 | usess = session->ust_session; | |
1107 | ||
85076754 MD |
1108 | /* |
1109 | * If a non-default channel has been created in the | |
1110 | * session, explicitely require that -c chan_name needs | |
1111 | * to be provided. | |
1112 | */ | |
1113 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1114 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1115 | goto error; | |
1116 | } | |
1117 | ||
2f77fc4b DG |
1118 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1119 | channel_name); | |
1120 | if (uchan == NULL) { | |
f73fabfd | 1121 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1122 | goto error; |
1123 | } | |
1124 | ||
6e911cad MD |
1125 | switch (event->type) { |
1126 | case LTTNG_EVENT_ALL: | |
1127 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); | |
1128 | if (ret != LTTNG_OK) { | |
1129 | goto error; | |
1130 | } | |
1131 | break; | |
1132 | default: | |
1133 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1134 | goto error; |
1135 | } | |
1136 | ||
1137 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1138 | channel_name); | |
1139 | break; | |
1140 | } | |
5cdb6027 | 1141 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1142 | case LTTNG_DOMAIN_JUL: |
1143 | { | |
fefd409b | 1144 | struct agent *agt; |
f20baf8e DG |
1145 | struct ltt_ust_session *usess = session->ust_session; |
1146 | ||
1147 | assert(usess); | |
1148 | ||
6e911cad MD |
1149 | switch (event->type) { |
1150 | case LTTNG_EVENT_ALL: | |
1151 | break; | |
1152 | default: | |
1153 | ret = LTTNG_ERR_UNK; | |
1154 | goto error; | |
1155 | } | |
1156 | ||
5cdb6027 | 1157 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1158 | if (!agt) { |
1159 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1160 | goto error; | |
1161 | } | |
18a720cd MD |
1162 | /* The wild card * means that everything should be disabled. */ |
1163 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1164 | ret = event_agent_disable_all(usess, agt); | |
1165 | } else { | |
1166 | ret = event_agent_disable(usess, agt, event_name); | |
1167 | } | |
f20baf8e DG |
1168 | if (ret != LTTNG_OK) { |
1169 | goto error; | |
1170 | } | |
1171 | ||
1172 | break; | |
1173 | } | |
2f77fc4b DG |
1174 | #if 0 |
1175 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1176 | case LTTNG_DOMAIN_UST_PID: | |
1177 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1178 | #endif | |
1179 | default: | |
f73fabfd | 1180 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1181 | goto error; |
1182 | } | |
1183 | ||
f73fabfd | 1184 | ret = LTTNG_OK; |
2f77fc4b DG |
1185 | |
1186 | error: | |
2223c96f | 1187 | rcu_read_unlock(); |
2f77fc4b DG |
1188 | return ret; |
1189 | } | |
1190 | ||
1191 | /* | |
18a720cd | 1192 | * Command LTTNG_DISABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1193 | */ |
18a720cd MD |
1194 | static |
1195 | int disable_kevent_all(struct ltt_session *session, int domain, | |
6e911cad MD |
1196 | char *channel_name, |
1197 | struct lttng_event *event) | |
2f77fc4b DG |
1198 | { |
1199 | int ret; | |
1200 | ||
2223c96f DG |
1201 | rcu_read_lock(); |
1202 | ||
2f77fc4b DG |
1203 | switch (domain) { |
1204 | case LTTNG_DOMAIN_KERNEL: | |
1205 | { | |
1206 | struct ltt_kernel_session *ksess; | |
1207 | struct ltt_kernel_channel *kchan; | |
1208 | ||
1209 | ksess = session->kernel_session; | |
1210 | ||
85076754 MD |
1211 | /* |
1212 | * If a non-default channel has been created in the | |
1213 | * session, explicitely require that -c chan_name needs | |
1214 | * to be provided. | |
1215 | */ | |
1216 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1217 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1218 | goto error; | |
1219 | } | |
1220 | ||
2f77fc4b DG |
1221 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1222 | if (kchan == NULL) { | |
f73fabfd | 1223 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1224 | goto error; |
1225 | } | |
1226 | ||
6e911cad MD |
1227 | switch (event->type) { |
1228 | case LTTNG_EVENT_ALL: | |
1229 | ret = event_kernel_disable_all(kchan); | |
1230 | if (ret != LTTNG_OK) { | |
1231 | goto error; | |
1232 | } | |
1233 | break; | |
1234 | case LTTNG_EVENT_SYSCALL: | |
e2b957af MD |
1235 | ret = event_kernel_disable_syscall(kchan, ""); |
1236 | if (ret != LTTNG_OK) { | |
1237 | goto error; | |
1238 | } | |
6e911cad MD |
1239 | break; |
1240 | default: | |
1241 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1242 | goto error; |
1243 | } | |
1244 | ||
1245 | kernel_wait_quiescent(kernel_tracer_fd); | |
1246 | break; | |
1247 | } | |
2f77fc4b | 1248 | default: |
f73fabfd | 1249 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1250 | goto error; |
1251 | } | |
1252 | ||
f73fabfd | 1253 | ret = LTTNG_OK; |
2f77fc4b DG |
1254 | |
1255 | error: | |
2223c96f | 1256 | rcu_read_unlock(); |
2f77fc4b DG |
1257 | return ret; |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1262 | */ | |
1263 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1264 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1265 | { |
d5979e4a | 1266 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1267 | |
1268 | switch (domain) { | |
1269 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1270 | assert(session->kernel_session); |
1271 | ||
1272 | if (session->kernel_session->channel_count == 0) { | |
1273 | /* Create default channel */ | |
1274 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1275 | if (ret != LTTNG_OK) { | |
1276 | goto error; | |
1277 | } | |
d5979e4a | 1278 | chan_kern_created = 1; |
979e618e | 1279 | } |
2f77fc4b | 1280 | /* Add kernel context to kernel tracer */ |
601d5acf | 1281 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1282 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1283 | goto error; |
1284 | } | |
1285 | break; | |
1286 | case LTTNG_DOMAIN_UST: | |
1287 | { | |
1288 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1289 | unsigned int chan_count; |
1290 | ||
2f77fc4b DG |
1291 | assert(usess); |
1292 | ||
85076754 | 1293 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1294 | if (chan_count == 0) { |
1295 | struct lttng_channel *attr; | |
1296 | /* Create default channel */ | |
0a9c6494 | 1297 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1298 | if (attr == NULL) { |
1299 | ret = LTTNG_ERR_FATAL; | |
1300 | goto error; | |
1301 | } | |
1302 | ||
7972aab2 | 1303 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1304 | if (ret != LTTNG_OK) { |
1305 | free(attr); | |
1306 | goto error; | |
1307 | } | |
1308 | free(attr); | |
d5979e4a | 1309 | chan_ust_created = 1; |
979e618e DG |
1310 | } |
1311 | ||
601d5acf | 1312 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1313 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1314 | goto error; |
1315 | } | |
1316 | break; | |
1317 | } | |
1318 | #if 0 | |
1319 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1320 | case LTTNG_DOMAIN_UST_PID: | |
1321 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1322 | #endif | |
1323 | default: | |
f73fabfd | 1324 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1325 | goto error; |
1326 | } | |
1327 | ||
d5979e4a | 1328 | return LTTNG_OK; |
2f77fc4b DG |
1329 | |
1330 | error: | |
d5979e4a DG |
1331 | if (chan_kern_created) { |
1332 | struct ltt_kernel_channel *kchan = | |
1333 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1334 | session->kernel_session); | |
1335 | /* Created previously, this should NOT fail. */ | |
1336 | assert(kchan); | |
1337 | kernel_destroy_channel(kchan); | |
1338 | } | |
1339 | ||
1340 | if (chan_ust_created) { | |
1341 | struct ltt_ust_channel *uchan = | |
1342 | trace_ust_find_channel_by_name( | |
1343 | session->ust_session->domain_global.channels, | |
1344 | DEFAULT_CHANNEL_NAME); | |
1345 | /* Created previously, this should NOT fail. */ | |
1346 | assert(uchan); | |
1347 | /* Remove from the channel list of the session. */ | |
1348 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1349 | uchan); | |
1350 | trace_ust_destroy_channel(uchan); | |
1351 | } | |
2f77fc4b DG |
1352 | return ret; |
1353 | } | |
1354 | ||
930a2e99 JG |
1355 | static int validate_event_name(const char *name) |
1356 | { | |
1357 | int ret = 0; | |
1358 | const char *c = name; | |
1359 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1360 | ||
1361 | /* | |
1362 | * Make sure that unescaped wildcards are only used as the last | |
1363 | * character of the event name. | |
1364 | */ | |
1365 | while (c < event_name_end) { | |
1366 | switch (*c) { | |
1367 | case '\0': | |
1368 | goto end; | |
1369 | case '\\': | |
1370 | c++; | |
1371 | break; | |
1372 | case '*': | |
1373 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1374 | /* Wildcard is not the last character */ | |
1375 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1376 | goto end; | |
1377 | } | |
1378 | default: | |
1379 | break; | |
1380 | } | |
1381 | c++; | |
1382 | } | |
1383 | end: | |
1384 | return ret; | |
1385 | } | |
1386 | ||
2f77fc4b DG |
1387 | /* |
1388 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
faa9eb17 | 1389 | * We own filter, exclusion, and filter_expression. |
2f77fc4b | 1390 | */ |
7972aab2 | 1391 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1392 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1393 | char *filter_expression, |
db8f1377 JI |
1394 | struct lttng_filter_bytecode *filter, |
1395 | struct lttng_event_exclusion *exclusion, | |
1396 | int wpipe) | |
2f77fc4b | 1397 | { |
e5f5db7f | 1398 | int ret, channel_created = 0; |
2f77fc4b DG |
1399 | struct lttng_channel *attr; |
1400 | ||
1401 | assert(session); | |
1402 | assert(event); | |
1403 | assert(channel_name); | |
1404 | ||
18a720cd MD |
1405 | DBG("Enable event command for event \'%s\'", event->name); |
1406 | ||
1407 | /* Special handling for kernel domain all events. */ | |
1408 | if (domain->type == LTTNG_DOMAIN_KERNEL && !strcmp(event->name, "*")) { | |
1409 | return enable_kevent_all(session, domain, channel_name, event, | |
1410 | filter_expression, filter, wpipe); | |
1411 | } | |
1412 | ||
930a2e99 JG |
1413 | ret = validate_event_name(event->name); |
1414 | if (ret) { | |
1415 | goto error; | |
1416 | } | |
1417 | ||
2223c96f DG |
1418 | rcu_read_lock(); |
1419 | ||
7972aab2 | 1420 | switch (domain->type) { |
2f77fc4b DG |
1421 | case LTTNG_DOMAIN_KERNEL: |
1422 | { | |
1423 | struct ltt_kernel_channel *kchan; | |
1424 | ||
85076754 MD |
1425 | /* |
1426 | * If a non-default channel has been created in the | |
1427 | * session, explicitely require that -c chan_name needs | |
1428 | * to be provided. | |
1429 | */ | |
1430 | if (session->kernel_session->has_non_default_channel | |
1431 | && channel_name[0] == '\0') { | |
1432 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1433 | goto error; | |
1434 | } | |
1435 | ||
2f77fc4b DG |
1436 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1437 | session->kernel_session); | |
1438 | if (kchan == NULL) { | |
0a9c6494 DG |
1439 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1440 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1441 | if (attr == NULL) { |
f73fabfd | 1442 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1443 | goto error; |
1444 | } | |
1445 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1446 | ||
1447 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1448 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1449 | free(attr); |
1450 | goto error; | |
1451 | } | |
1452 | free(attr); | |
e5f5db7f DG |
1453 | |
1454 | channel_created = 1; | |
2f77fc4b DG |
1455 | } |
1456 | ||
1457 | /* Get the newly created kernel channel pointer */ | |
1458 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1459 | session->kernel_session); | |
1460 | if (kchan == NULL) { | |
1461 | /* This sould not happen... */ | |
f73fabfd | 1462 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1463 | goto error; |
1464 | } | |
1465 | ||
6e911cad MD |
1466 | switch (event->type) { |
1467 | case LTTNG_EVENT_ALL: | |
6e6ef3d7 DG |
1468 | case LTTNG_EVENT_PROBE: |
1469 | case LTTNG_EVENT_FUNCTION: | |
1470 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad MD |
1471 | case LTTNG_EVENT_TRACEPOINT: |
1472 | ret = event_kernel_enable_tracepoint(kchan, event); | |
1473 | if (ret != LTTNG_OK) { | |
1474 | if (channel_created) { | |
1475 | /* Let's not leak a useless channel. */ | |
1476 | kernel_destroy_channel(kchan); | |
1477 | } | |
1478 | goto error; | |
e5f5db7f | 1479 | } |
6e911cad MD |
1480 | break; |
1481 | case LTTNG_EVENT_SYSCALL: | |
1482 | ret = event_kernel_enable_syscall(kchan, event->name); | |
e2b957af MD |
1483 | if (ret != LTTNG_OK) { |
1484 | goto error; | |
1485 | } | |
6e911cad MD |
1486 | break; |
1487 | default: | |
1488 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1489 | goto error; |
1490 | } | |
1491 | ||
1492 | kernel_wait_quiescent(kernel_tracer_fd); | |
1493 | break; | |
1494 | } | |
1495 | case LTTNG_DOMAIN_UST: | |
1496 | { | |
1497 | struct ltt_ust_channel *uchan; | |
1498 | struct ltt_ust_session *usess = session->ust_session; | |
1499 | ||
1500 | assert(usess); | |
1501 | ||
85076754 MD |
1502 | /* |
1503 | * If a non-default channel has been created in the | |
1504 | * session, explicitely require that -c chan_name needs | |
1505 | * to be provided. | |
1506 | */ | |
1507 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1508 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1509 | goto error; | |
1510 | } | |
1511 | ||
2f77fc4b DG |
1512 | /* Get channel from global UST domain */ |
1513 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1514 | channel_name); | |
1515 | if (uchan == NULL) { | |
1516 | /* Create default channel */ | |
0a9c6494 DG |
1517 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1518 | usess->buffer_type); | |
2f77fc4b | 1519 | if (attr == NULL) { |
f73fabfd | 1520 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1521 | goto error; |
1522 | } | |
1523 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1524 | ||
1525 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1526 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1527 | free(attr); |
1528 | goto error; | |
1529 | } | |
1530 | free(attr); | |
1531 | ||
1532 | /* Get the newly created channel reference back */ | |
1533 | uchan = trace_ust_find_channel_by_name( | |
1534 | usess->domain_global.channels, channel_name); | |
1535 | assert(uchan); | |
1536 | } | |
1537 | ||
1538 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1539 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1540 | filter_expression, filter, exclusion); | |
faa9eb17 MD |
1541 | /* We have passed ownership */ |
1542 | filter_expression = NULL; | |
1543 | filter = NULL; | |
1544 | exclusion = NULL; | |
f73fabfd | 1545 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1546 | goto error; |
1547 | } | |
1548 | break; | |
1549 | } | |
5cdb6027 | 1550 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1551 | case LTTNG_DOMAIN_JUL: |
1552 | { | |
da6c3a50 | 1553 | const char *default_event_name, *default_chan_name; |
fefd409b | 1554 | struct agent *agt; |
f20baf8e DG |
1555 | struct lttng_event uevent; |
1556 | struct lttng_domain tmp_dom; | |
1557 | struct ltt_ust_session *usess = session->ust_session; | |
1558 | ||
1559 | assert(usess); | |
1560 | ||
5cdb6027 | 1561 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1562 | if (!agt) { |
5cdb6027 | 1563 | agt = agent_create(domain->type); |
fefd409b DG |
1564 | if (!agt) { |
1565 | ret = -LTTNG_ERR_NOMEM; | |
1566 | goto error; | |
1567 | } | |
1568 | agent_add(agt, usess->agents); | |
1569 | } | |
1570 | ||
022d91ba | 1571 | /* Create the default tracepoint. */ |
996de3c7 | 1572 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1573 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1574 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1575 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1576 | if (!default_event_name) { | |
1577 | ret = -LTTNG_ERR_FATAL; | |
1578 | goto error; | |
f43f95a9 | 1579 | } |
da6c3a50 | 1580 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1581 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1582 | ||
1583 | /* | |
1584 | * The domain type is changed because we are about to enable the | |
1585 | * default channel and event for the JUL domain that are hardcoded. | |
1586 | * This happens in the UST domain. | |
1587 | */ | |
1588 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1589 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1590 | ||
da6c3a50 DG |
1591 | if (domain->type == LTTNG_DOMAIN_LOG4J) { |
1592 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
1593 | } else { | |
1594 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; | |
1595 | } | |
1596 | ||
0f9981d0 JG |
1597 | { |
1598 | struct lttng_filter_bytecode *filter_copy = NULL; | |
1599 | ||
1600 | if (filter) { | |
1601 | filter_copy = zmalloc( | |
1602 | sizeof(struct lttng_filter_bytecode) | |
1603 | + filter->len); | |
1604 | if (!filter_copy) { | |
1605 | goto error; | |
1606 | } | |
1607 | ||
1608 | memcpy(filter_copy, filter, | |
1609 | sizeof(struct lttng_filter_bytecode) | |
1610 | + filter->len); | |
1611 | } | |
1612 | ||
1613 | ret = cmd_enable_event(session, &tmp_dom, | |
1614 | (char *) default_chan_name, | |
1615 | &uevent, filter_expression, filter_copy, | |
1616 | NULL, wpipe); | |
1617 | /* We have passed ownership */ | |
1618 | filter_expression = NULL; | |
1619 | } | |
1620 | ||
f20baf8e DG |
1621 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1622 | goto error; | |
1623 | } | |
1624 | ||
1625 | /* The wild card * means that everything should be enabled. */ | |
1626 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1627 | ret = event_agent_enable_all(usess, agt, event, filter); |
0f9981d0 | 1628 | filter = NULL; |
f20baf8e | 1629 | } else { |
fefd409b | 1630 | ret = event_agent_enable(usess, agt, event, filter); |
0f9981d0 | 1631 | filter = NULL; |
f20baf8e DG |
1632 | } |
1633 | if (ret != LTTNG_OK) { | |
1634 | goto error; | |
1635 | } | |
1636 | ||
1637 | break; | |
1638 | } | |
2f77fc4b DG |
1639 | #if 0 |
1640 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1641 | case LTTNG_DOMAIN_UST_PID: | |
1642 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1643 | #endif | |
1644 | default: | |
f73fabfd | 1645 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1646 | goto error; |
1647 | } | |
1648 | ||
f73fabfd | 1649 | ret = LTTNG_OK; |
2f77fc4b DG |
1650 | |
1651 | error: | |
faa9eb17 MD |
1652 | free(filter_expression); |
1653 | free(filter); | |
1654 | free(exclusion); | |
2223c96f | 1655 | rcu_read_unlock(); |
2f77fc4b DG |
1656 | return ret; |
1657 | } | |
1658 | ||
1659 | /* | |
18a720cd | 1660 | * Command LTTNG_ENABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1661 | */ |
18a720cd MD |
1662 | static |
1663 | int enable_kevent_all(struct ltt_session *session, | |
1664 | struct lttng_domain *domain, char *channel_name, | |
1665 | struct lttng_event *event, | |
6b453b5e | 1666 | char *filter_expression, |
025faf73 | 1667 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1668 | { |
1669 | int ret; | |
1670 | struct lttng_channel *attr; | |
1671 | ||
1672 | assert(session); | |
1673 | assert(channel_name); | |
1674 | ||
2223c96f DG |
1675 | rcu_read_lock(); |
1676 | ||
7972aab2 | 1677 | switch (domain->type) { |
2f77fc4b DG |
1678 | case LTTNG_DOMAIN_KERNEL: |
1679 | { | |
1680 | struct ltt_kernel_channel *kchan; | |
1681 | ||
1682 | assert(session->kernel_session); | |
1683 | ||
85076754 MD |
1684 | /* |
1685 | * If a non-default channel has been created in the | |
1686 | * session, explicitely require that -c chan_name needs | |
1687 | * to be provided. | |
1688 | */ | |
1689 | if (session->kernel_session->has_non_default_channel | |
1690 | && channel_name[0] == '\0') { | |
1691 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1692 | goto error; | |
1693 | } | |
1694 | ||
2f77fc4b DG |
1695 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1696 | session->kernel_session); | |
1697 | if (kchan == NULL) { | |
1698 | /* Create default channel */ | |
0a9c6494 DG |
1699 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1700 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1701 | if (attr == NULL) { |
f73fabfd | 1702 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1703 | goto error; |
1704 | } | |
1705 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1706 | ||
1707 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1708 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1709 | free(attr); |
1710 | goto error; | |
1711 | } | |
1712 | free(attr); | |
1713 | ||
1714 | /* Get the newly created kernel channel pointer */ | |
1715 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1716 | session->kernel_session); | |
1717 | assert(kchan); | |
1718 | } | |
1719 | ||
18a720cd | 1720 | switch (event->type) { |
2f77fc4b | 1721 | case LTTNG_EVENT_SYSCALL: |
6e911cad | 1722 | ret = event_kernel_enable_syscall(kchan, ""); |
e2b957af MD |
1723 | if (ret != LTTNG_OK) { |
1724 | goto error; | |
1725 | } | |
2f77fc4b DG |
1726 | break; |
1727 | case LTTNG_EVENT_TRACEPOINT: | |
1728 | /* | |
1729 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1730 | * events already registered to the channel. | |
1731 | */ | |
d3a56674 | 1732 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1733 | break; |
1734 | case LTTNG_EVENT_ALL: | |
1735 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1736 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1737 | break; |
1738 | default: | |
f73fabfd | 1739 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1740 | goto error; |
1741 | } | |
1742 | ||
1743 | /* Manage return value */ | |
f73fabfd | 1744 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1745 | /* |
1746 | * On error, cmd_enable_channel call will take care of destroying | |
1747 | * the created channel if it was needed. | |
1748 | */ | |
2f77fc4b DG |
1749 | goto error; |
1750 | } | |
1751 | ||
1752 | kernel_wait_quiescent(kernel_tracer_fd); | |
1753 | break; | |
1754 | } | |
2f77fc4b | 1755 | default: |
f73fabfd | 1756 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1757 | goto error; |
1758 | } | |
1759 | ||
f73fabfd | 1760 | ret = LTTNG_OK; |
2f77fc4b DG |
1761 | |
1762 | error: | |
2223c96f | 1763 | rcu_read_unlock(); |
2f77fc4b DG |
1764 | return ret; |
1765 | } | |
1766 | ||
1767 | ||
1768 | /* | |
1769 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1770 | */ | |
1771 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1772 | { | |
1773 | int ret; | |
1774 | ssize_t nb_events = 0; | |
1775 | ||
1776 | switch (domain) { | |
1777 | case LTTNG_DOMAIN_KERNEL: | |
1778 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1779 | if (nb_events < 0) { | |
f73fabfd | 1780 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1781 | goto error; |
1782 | } | |
1783 | break; | |
1784 | case LTTNG_DOMAIN_UST: | |
1785 | nb_events = ust_app_list_events(events); | |
1786 | if (nb_events < 0) { | |
f73fabfd | 1787 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1788 | goto error; |
1789 | } | |
1790 | break; | |
5cdb6027 | 1791 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1792 | case LTTNG_DOMAIN_JUL: |
f60140a1 | 1793 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1794 | if (nb_events < 0) { |
1795 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1796 | goto error; | |
1797 | } | |
1798 | break; | |
2f77fc4b | 1799 | default: |
f73fabfd | 1800 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1801 | goto error; |
1802 | } | |
1803 | ||
1804 | return nb_events; | |
1805 | ||
1806 | error: | |
1807 | /* Return negative value to differentiate return code */ | |
1808 | return -ret; | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1813 | */ | |
1814 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1815 | struct lttng_event_field **fields) | |
1816 | { | |
1817 | int ret; | |
1818 | ssize_t nb_fields = 0; | |
1819 | ||
1820 | switch (domain) { | |
1821 | case LTTNG_DOMAIN_UST: | |
1822 | nb_fields = ust_app_list_event_fields(fields); | |
1823 | if (nb_fields < 0) { | |
f73fabfd | 1824 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1825 | goto error; |
1826 | } | |
1827 | break; | |
1828 | case LTTNG_DOMAIN_KERNEL: | |
1829 | default: /* fall-through */ | |
f73fabfd | 1830 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1831 | goto error; |
1832 | } | |
1833 | ||
1834 | return nb_fields; | |
1835 | ||
1836 | error: | |
1837 | /* Return negative value to differentiate return code */ | |
1838 | return -ret; | |
1839 | } | |
1840 | ||
834978fd DG |
1841 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1842 | { | |
1843 | return syscall_table_list(events); | |
1844 | } | |
1845 | ||
2f77fc4b DG |
1846 | /* |
1847 | * Command LTTNG_START_TRACE processed by the client thread. | |
1848 | */ | |
1849 | int cmd_start_trace(struct ltt_session *session) | |
1850 | { | |
1851 | int ret; | |
cde3e505 | 1852 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1853 | struct ltt_kernel_session *ksession; |
1854 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1855 | |
1856 | assert(session); | |
1857 | ||
1858 | /* Ease our life a bit ;) */ | |
1859 | ksession = session->kernel_session; | |
1860 | usess = session->ust_session; | |
1861 | ||
8382cf6f DG |
1862 | /* Is the session already started? */ |
1863 | if (session->active) { | |
f73fabfd | 1864 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1865 | goto error; |
1866 | } | |
1867 | ||
cde3e505 DG |
1868 | /* |
1869 | * Starting a session without channel is useless since after that it's not | |
1870 | * possible to enable channel thus inform the client. | |
1871 | */ | |
1872 | if (usess && usess->domain_global.channels) { | |
492a6634 | 1873 | rcu_read_lock(); |
cde3e505 | 1874 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); |
492a6634 | 1875 | rcu_read_unlock(); |
cde3e505 DG |
1876 | } |
1877 | if (ksession) { | |
1878 | nb_chan += ksession->channel_count; | |
1879 | } | |
1880 | if (!nb_chan) { | |
1881 | ret = LTTNG_ERR_NO_CHANNEL; | |
1882 | goto error; | |
1883 | } | |
1884 | ||
2f77fc4b DG |
1885 | /* Kernel tracing */ |
1886 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1887 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1888 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1889 | goto error; |
1890 | } | |
2f77fc4b DG |
1891 | } |
1892 | ||
1893 | /* Flag session that trace should start automatically */ | |
1894 | if (usess) { | |
14fb1ebe DG |
1895 | /* |
1896 | * Even though the start trace might fail, flag this session active so | |
1897 | * other application coming in are started by default. | |
1898 | */ | |
1899 | usess->active = 1; | |
2f77fc4b DG |
1900 | |
1901 | ret = ust_app_start_trace_all(usess); | |
1902 | if (ret < 0) { | |
f73fabfd | 1903 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1904 | goto error; |
1905 | } | |
1906 | } | |
1907 | ||
8382cf6f DG |
1908 | /* Flag this after a successful start. */ |
1909 | session->has_been_started = 1; | |
1910 | session->active = 1; | |
9b6c7ec5 | 1911 | |
f73fabfd | 1912 | ret = LTTNG_OK; |
2f77fc4b DG |
1913 | |
1914 | error: | |
1915 | return ret; | |
1916 | } | |
1917 | ||
1918 | /* | |
1919 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1920 | */ | |
1921 | int cmd_stop_trace(struct ltt_session *session) | |
1922 | { | |
1923 | int ret; | |
1924 | struct ltt_kernel_channel *kchan; | |
1925 | struct ltt_kernel_session *ksession; | |
1926 | struct ltt_ust_session *usess; | |
1927 | ||
1928 | assert(session); | |
1929 | ||
1930 | /* Short cut */ | |
1931 | ksession = session->kernel_session; | |
1932 | usess = session->ust_session; | |
1933 | ||
8382cf6f DG |
1934 | /* Session is not active. Skip everythong and inform the client. */ |
1935 | if (!session->active) { | |
f73fabfd | 1936 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1937 | goto error; |
1938 | } | |
1939 | ||
2f77fc4b | 1940 | /* Kernel tracer */ |
14fb1ebe | 1941 | if (ksession && ksession->active) { |
2f77fc4b DG |
1942 | DBG("Stop kernel tracing"); |
1943 | ||
1944 | /* Flush metadata if exist */ | |
1945 | if (ksession->metadata_stream_fd >= 0) { | |
1946 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1947 | if (ret < 0) { | |
1948 | ERR("Kernel metadata flush failed"); | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | /* Flush all buffers before stopping */ | |
1953 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1954 | ret = kernel_flush_buffer(kchan); | |
1955 | if (ret < 0) { | |
1956 | ERR("Kernel flush buffer error"); | |
1957 | } | |
1958 | } | |
1959 | ||
1960 | ret = kernel_stop_session(ksession); | |
1961 | if (ret < 0) { | |
f73fabfd | 1962 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1963 | goto error; |
1964 | } | |
1965 | ||
1966 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 1967 | |
14fb1ebe | 1968 | ksession->active = 0; |
2f77fc4b DG |
1969 | } |
1970 | ||
14fb1ebe DG |
1971 | if (usess && usess->active) { |
1972 | /* | |
1973 | * Even though the stop trace might fail, flag this session inactive so | |
1974 | * other application coming in are not started by default. | |
1975 | */ | |
1976 | usess->active = 0; | |
2f77fc4b DG |
1977 | |
1978 | ret = ust_app_stop_trace_all(usess); | |
1979 | if (ret < 0) { | |
f73fabfd | 1980 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1981 | goto error; |
1982 | } | |
1983 | } | |
1984 | ||
8382cf6f DG |
1985 | /* Flag inactive after a successful stop. */ |
1986 | session->active = 0; | |
f73fabfd | 1987 | ret = LTTNG_OK; |
2f77fc4b DG |
1988 | |
1989 | error: | |
1990 | return ret; | |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1995 | */ | |
1996 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1997 | size_t nb_uri, struct lttng_uri *uris) | |
1998 | { | |
1999 | int ret, i; | |
2000 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2001 | struct ltt_ust_session *usess = session->ust_session; | |
2002 | struct consumer_output *consumer = NULL; | |
2003 | ||
2004 | assert(session); | |
2005 | assert(uris); | |
2006 | assert(nb_uri > 0); | |
2007 | ||
8382cf6f DG |
2008 | /* Can't set consumer URI if the session is active. */ |
2009 | if (session->active) { | |
f73fabfd | 2010 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2011 | goto error; |
2012 | } | |
2013 | ||
2f77fc4b DG |
2014 | /* |
2015 | * This case switch makes sure the domain session has a temporary consumer | |
2016 | * so the URL can be set. | |
2017 | */ | |
2018 | switch (domain) { | |
2019 | case 0: | |
2020 | /* Code flow error. A session MUST always have a consumer object */ | |
2021 | assert(session->consumer); | |
2022 | /* | |
2023 | * The URL will be added to the tracing session consumer instead of a | |
2024 | * specific domain consumer. | |
2025 | */ | |
2026 | consumer = session->consumer; | |
2027 | break; | |
2028 | case LTTNG_DOMAIN_KERNEL: | |
2029 | /* Code flow error if we don't have a kernel session here. */ | |
2030 | assert(ksess); | |
785d2d0d DG |
2031 | assert(ksess->consumer); |
2032 | consumer = ksess->consumer; | |
2f77fc4b DG |
2033 | break; |
2034 | case LTTNG_DOMAIN_UST: | |
2035 | /* Code flow error if we don't have a kernel session here. */ | |
2036 | assert(usess); | |
785d2d0d DG |
2037 | assert(usess->consumer); |
2038 | consumer = usess->consumer; | |
2f77fc4b DG |
2039 | break; |
2040 | } | |
2041 | ||
2042 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b | 2043 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
a74934ba | 2044 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2045 | goto error; |
2046 | } | |
2f77fc4b DG |
2047 | } |
2048 | ||
7ab70fe0 DG |
2049 | /* |
2050 | * Make sure to set the session in output mode after we set URI since a | |
2051 | * session can be created without URL (thus flagged in no output mode). | |
2052 | */ | |
2053 | session->output_traces = 1; | |
2054 | if (ksess) { | |
2055 | ksess->output_traces = 1; | |
2056 | } else if (usess) { | |
2057 | usess->output_traces = 1; | |
2058 | } | |
2059 | ||
2f77fc4b | 2060 | /* All good! */ |
f73fabfd | 2061 | ret = LTTNG_OK; |
2f77fc4b DG |
2062 | |
2063 | error: | |
2064 | return ret; | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2069 | */ | |
2070 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2071 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2072 | { |
2073 | int ret; | |
2f77fc4b DG |
2074 | struct ltt_session *session; |
2075 | ||
2076 | assert(name); | |
2bba9e53 | 2077 | assert(creds); |
785d2d0d | 2078 | |
2f77fc4b DG |
2079 | /* |
2080 | * Verify if the session already exist | |
2081 | * | |
2082 | * XXX: There is no need for the session lock list here since the caller | |
2083 | * (process_client_msg) is holding it. We might want to change that so a | |
2084 | * single command does not lock the entire session list. | |
2085 | */ | |
2086 | session = session_find_by_name(name); | |
2087 | if (session != NULL) { | |
f73fabfd | 2088 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2089 | goto find_error; |
2090 | } | |
2091 | ||
2092 | /* Create tracing session in the registry */ | |
dec56f6c | 2093 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2094 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2095 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2096 | goto session_error; |
2097 | } | |
2098 | ||
2099 | /* | |
2100 | * Get the newly created session pointer back | |
2101 | * | |
2102 | * XXX: There is no need for the session lock list here since the caller | |
2103 | * (process_client_msg) is holding it. We might want to change that so a | |
2104 | * single command does not lock the entire session list. | |
2105 | */ | |
2106 | session = session_find_by_name(name); | |
2107 | assert(session); | |
2108 | ||
ecc48a90 | 2109 | session->live_timer = live_timer; |
2f77fc4b DG |
2110 | /* Create default consumer output for the session not yet created. */ |
2111 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2112 | if (session->consumer == NULL) { | |
f73fabfd | 2113 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2114 | goto consumer_error; |
2115 | } | |
2116 | ||
2bba9e53 DG |
2117 | if (uris) { |
2118 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
2119 | if (ret != LTTNG_OK) { | |
2120 | goto consumer_error; | |
2121 | } | |
2122 | session->output_traces = 1; | |
2123 | } else { | |
2124 | session->output_traces = 0; | |
2125 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2126 | } |
2127 | ||
2128 | session->consumer->enabled = 1; | |
2129 | ||
f73fabfd | 2130 | return LTTNG_OK; |
2f77fc4b DG |
2131 | |
2132 | consumer_error: | |
2133 | session_destroy(session); | |
2134 | session_error: | |
2135 | find_error: | |
2136 | return ret; | |
2137 | } | |
2138 | ||
27babd3a DG |
2139 | /* |
2140 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2141 | */ | |
2142 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2143 | size_t nb_uri, lttng_sock_cred *creds) | |
2144 | { | |
2145 | int ret; | |
2146 | struct ltt_session *session; | |
2147 | struct snapshot_output *new_output = NULL; | |
2148 | ||
2149 | assert(name); | |
2150 | assert(creds); | |
2151 | ||
2152 | /* | |
2153 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2154 | * received are for a default snapshot output if one. | |
2155 | */ | |
ecc48a90 | 2156 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2157 | if (ret != LTTNG_OK) { |
2158 | goto error; | |
2159 | } | |
2160 | ||
2161 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2162 | session = session_find_by_name(name); | |
2163 | assert(session); | |
2164 | ||
2165 | /* Flag session for snapshot mode. */ | |
2166 | session->snapshot_mode = 1; | |
2167 | ||
2168 | /* Skip snapshot output creation if no URI is given. */ | |
2169 | if (nb_uri == 0) { | |
2170 | goto end; | |
2171 | } | |
2172 | ||
2173 | new_output = snapshot_output_alloc(); | |
2174 | if (!new_output) { | |
2175 | ret = LTTNG_ERR_NOMEM; | |
2176 | goto error_snapshot_alloc; | |
2177 | } | |
2178 | ||
2179 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2180 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2181 | if (ret < 0) { | |
2182 | if (ret == -ENOMEM) { | |
2183 | ret = LTTNG_ERR_NOMEM; | |
2184 | } else { | |
2185 | ret = LTTNG_ERR_INVALID; | |
2186 | } | |
2187 | goto error_snapshot; | |
2188 | } | |
2189 | ||
2190 | rcu_read_lock(); | |
2191 | snapshot_add_output(&session->snapshot, new_output); | |
2192 | rcu_read_unlock(); | |
2193 | ||
2194 | end: | |
2195 | return LTTNG_OK; | |
2196 | ||
2197 | error_snapshot: | |
2198 | snapshot_output_destroy(new_output); | |
2199 | error_snapshot_alloc: | |
2200 | session_destroy(session); | |
2201 | error: | |
2202 | return ret; | |
2203 | } | |
2204 | ||
2f77fc4b DG |
2205 | /* |
2206 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2207 | */ | |
2208 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2209 | { | |
2210 | int ret; | |
2211 | struct ltt_ust_session *usess; | |
2212 | struct ltt_kernel_session *ksess; | |
2213 | ||
2214 | /* Safety net */ | |
2215 | assert(session); | |
2216 | ||
2217 | usess = session->ust_session; | |
2218 | ksess = session->kernel_session; | |
2219 | ||
2220 | /* Clean kernel session teardown */ | |
2221 | kernel_destroy_session(ksess); | |
2222 | ||
2223 | /* UST session teardown */ | |
2224 | if (usess) { | |
2225 | /* Close any relayd session */ | |
2226 | consumer_output_send_destroy_relayd(usess->consumer); | |
2227 | ||
2228 | /* Destroy every UST application related to this session. */ | |
2229 | ret = ust_app_destroy_trace_all(usess); | |
2230 | if (ret) { | |
2231 | ERR("Error in ust_app_destroy_trace_all"); | |
2232 | } | |
2233 | ||
2234 | /* Clean up the rest. */ | |
2235 | trace_ust_destroy_session(usess); | |
2236 | } | |
2237 | ||
2238 | /* | |
2239 | * Must notify the kernel thread here to update it's poll set in order to | |
2240 | * remove the channel(s)' fd just destroyed. | |
2241 | */ | |
2242 | ret = notify_thread_pipe(wpipe); | |
2243 | if (ret < 0) { | |
2244 | PERROR("write kernel poll pipe"); | |
2245 | } | |
2246 | ||
2247 | ret = session_destroy(session); | |
2248 | ||
2249 | return ret; | |
2250 | } | |
2251 | ||
2252 | /* | |
2253 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2254 | */ | |
2255 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2256 | { | |
2257 | int ret; | |
2258 | ||
2259 | switch (domain) { | |
2260 | case LTTNG_DOMAIN_KERNEL: | |
2261 | { | |
2262 | struct lttng_kernel_calibrate kcalibrate; | |
2263 | ||
2e84128e DG |
2264 | switch (calibrate->type) { |
2265 | case LTTNG_CALIBRATE_FUNCTION: | |
2266 | default: | |
2267 | /* Default and only possible calibrate option. */ | |
2268 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2269 | break; | |
2270 | } | |
2271 | ||
2f77fc4b DG |
2272 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2273 | if (ret < 0) { | |
f73fabfd | 2274 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2275 | goto error; |
2276 | } | |
2277 | break; | |
2278 | } | |
2279 | case LTTNG_DOMAIN_UST: | |
2280 | { | |
2281 | struct lttng_ust_calibrate ucalibrate; | |
2282 | ||
2e84128e DG |
2283 | switch (calibrate->type) { |
2284 | case LTTNG_CALIBRATE_FUNCTION: | |
2285 | default: | |
2286 | /* Default and only possible calibrate option. */ | |
2287 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2288 | break; | |
2289 | } | |
2290 | ||
2f77fc4b DG |
2291 | ret = ust_app_calibrate_glb(&ucalibrate); |
2292 | if (ret < 0) { | |
f73fabfd | 2293 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2294 | goto error; |
2295 | } | |
2296 | break; | |
2297 | } | |
2298 | default: | |
f73fabfd | 2299 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2300 | goto error; |
2301 | } | |
2302 | ||
f73fabfd | 2303 | ret = LTTNG_OK; |
2f77fc4b DG |
2304 | |
2305 | error: | |
2306 | return ret; | |
2307 | } | |
2308 | ||
2309 | /* | |
2310 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2311 | */ | |
2312 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2313 | const char *sock_path, struct consumer_data *cdata) | |
2314 | { | |
2315 | int ret, sock; | |
dd81b457 | 2316 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2317 | |
2318 | assert(session); | |
2319 | assert(cdata); | |
2320 | assert(sock_path); | |
2321 | ||
2322 | switch (domain) { | |
2323 | case LTTNG_DOMAIN_KERNEL: | |
2324 | { | |
2325 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2326 | ||
2327 | assert(ksess); | |
2328 | ||
2329 | /* Can't register a consumer if there is already one */ | |
2330 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2331 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2332 | goto error; |
2333 | } | |
2334 | ||
2335 | sock = lttcomm_connect_unix_sock(sock_path); | |
2336 | if (sock < 0) { | |
f73fabfd | 2337 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2338 | goto error; |
2339 | } | |
4ce514c4 | 2340 | cdata->cmd_sock = sock; |
2f77fc4b | 2341 | |
4ce514c4 | 2342 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2343 | if (socket == NULL) { |
f66c074c DG |
2344 | ret = close(sock); |
2345 | if (ret < 0) { | |
2346 | PERROR("close register consumer"); | |
2347 | } | |
4ce514c4 | 2348 | cdata->cmd_sock = -1; |
f73fabfd | 2349 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2350 | goto error; |
2351 | } | |
2352 | ||
2353 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2354 | if (socket->lock == NULL) { | |
2355 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2356 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2357 | goto error; |
2358 | } | |
2359 | pthread_mutex_init(socket->lock, NULL); | |
2360 | socket->registered = 1; | |
2361 | ||
2362 | rcu_read_lock(); | |
2363 | consumer_add_socket(socket, ksess->consumer); | |
2364 | rcu_read_unlock(); | |
2365 | ||
2366 | pthread_mutex_lock(&cdata->pid_mutex); | |
2367 | cdata->pid = -1; | |
2368 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2369 | ||
2370 | break; | |
2371 | } | |
2372 | default: | |
2373 | /* TODO: Userspace tracing */ | |
f73fabfd | 2374 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2375 | goto error; |
2376 | } | |
2377 | ||
dd81b457 | 2378 | return LTTNG_OK; |
2f77fc4b DG |
2379 | |
2380 | error: | |
dd81b457 DG |
2381 | if (socket) { |
2382 | consumer_destroy_socket(socket); | |
2383 | } | |
2f77fc4b DG |
2384 | return ret; |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2389 | */ | |
2390 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2391 | struct lttng_domain **domains) | |
2392 | { | |
2393 | int ret, index = 0; | |
2394 | ssize_t nb_dom = 0; | |
fefd409b DG |
2395 | struct agent *agt; |
2396 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2397 | |
2398 | if (session->kernel_session != NULL) { | |
2399 | DBG3("Listing domains found kernel domain"); | |
2400 | nb_dom++; | |
2401 | } | |
2402 | ||
2403 | if (session->ust_session != NULL) { | |
2404 | DBG3("Listing domains found UST global domain"); | |
2405 | nb_dom++; | |
3c6a091f | 2406 | |
f376cc6a | 2407 | rcu_read_lock(); |
fefd409b DG |
2408 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2409 | agt, node.node) { | |
2410 | if (agt->being_used) { | |
2411 | nb_dom++; | |
2412 | } | |
3c6a091f | 2413 | } |
f376cc6a | 2414 | rcu_read_unlock(); |
2f77fc4b DG |
2415 | } |
2416 | ||
2417 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2418 | if (*domains == NULL) { | |
f73fabfd | 2419 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2420 | goto error; |
2421 | } | |
2422 | ||
2423 | if (session->kernel_session != NULL) { | |
2424 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2425 | index++; | |
2426 | } | |
2427 | ||
2428 | if (session->ust_session != NULL) { | |
2429 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2430 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2431 | index++; |
3c6a091f | 2432 | |
f376cc6a | 2433 | rcu_read_lock(); |
fefd409b DG |
2434 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2435 | agt, node.node) { | |
2436 | if (agt->being_used) { | |
2437 | (*domains)[index].type = agt->domain; | |
2438 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2439 | index++; | |
2440 | } | |
3c6a091f | 2441 | } |
f376cc6a | 2442 | rcu_read_unlock(); |
2f77fc4b DG |
2443 | } |
2444 | ||
2445 | return nb_dom; | |
2446 | ||
2447 | error: | |
f73fabfd DG |
2448 | /* Return negative value to differentiate return code */ |
2449 | return -ret; | |
2f77fc4b DG |
2450 | } |
2451 | ||
2452 | ||
2453 | /* | |
2454 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2455 | */ | |
2456 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2457 | struct lttng_channel **channels) | |
2458 | { | |
2459 | int ret; | |
2460 | ssize_t nb_chan = 0; | |
2461 | ||
2462 | switch (domain) { | |
2463 | case LTTNG_DOMAIN_KERNEL: | |
2464 | if (session->kernel_session != NULL) { | |
2465 | nb_chan = session->kernel_session->channel_count; | |
2466 | } | |
2467 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2468 | if (nb_chan <= 0) { |
2469 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2470 | } | |
2f77fc4b DG |
2471 | break; |
2472 | case LTTNG_DOMAIN_UST: | |
2473 | if (session->ust_session != NULL) { | |
db81f999 | 2474 | rcu_read_lock(); |
2f77fc4b | 2475 | nb_chan = lttng_ht_get_count( |
db81f999 JG |
2476 | session->ust_session->domain_global.channels); |
2477 | rcu_read_unlock(); | |
2f77fc4b DG |
2478 | } |
2479 | DBG3("Number of UST global channels %zd", nb_chan); | |
9247b8d0 | 2480 | if (nb_chan < 0) { |
c7d620a2 | 2481 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
9247b8d0 | 2482 | goto error; |
c7d620a2 | 2483 | } |
2f77fc4b DG |
2484 | break; |
2485 | default: | |
f73fabfd | 2486 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2487 | goto error; |
2488 | } | |
2489 | ||
2490 | if (nb_chan > 0) { | |
2491 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2492 | if (*channels == NULL) { | |
f73fabfd | 2493 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2494 | goto error; |
2495 | } | |
2496 | ||
2497 | list_lttng_channels(domain, session, *channels); | |
2f77fc4b DG |
2498 | } |
2499 | ||
2500 | return nb_chan; | |
2501 | ||
2502 | error: | |
f73fabfd DG |
2503 | /* Return negative value to differentiate return code */ |
2504 | return -ret; | |
2f77fc4b DG |
2505 | } |
2506 | ||
2507 | /* | |
2508 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2509 | */ | |
2510 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2511 | char *channel_name, struct lttng_event **events) | |
2512 | { | |
2513 | int ret = 0; | |
2514 | ssize_t nb_event = 0; | |
2515 | ||
2516 | switch (domain) { | |
2517 | case LTTNG_DOMAIN_KERNEL: | |
2518 | if (session->kernel_session != NULL) { | |
2519 | nb_event = list_lttng_kernel_events(channel_name, | |
2520 | session->kernel_session, events); | |
2521 | } | |
2522 | break; | |
2523 | case LTTNG_DOMAIN_UST: | |
2524 | { | |
2525 | if (session->ust_session != NULL) { | |
2526 | nb_event = list_lttng_ust_global_events(channel_name, | |
2527 | &session->ust_session->domain_global, events); | |
2528 | } | |
2529 | break; | |
2530 | } | |
5cdb6027 | 2531 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f DG |
2532 | case LTTNG_DOMAIN_JUL: |
2533 | if (session->ust_session) { | |
fefd409b DG |
2534 | struct lttng_ht_iter iter; |
2535 | struct agent *agt; | |
2536 | ||
a3f99e26 | 2537 | rcu_read_lock(); |
fefd409b DG |
2538 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2539 | &iter.iter, agt, node.node) { | |
2540 | nb_event = list_lttng_agent_events(agt, events); | |
2541 | } | |
a3f99e26 | 2542 | rcu_read_unlock(); |
3c6a091f DG |
2543 | } |
2544 | break; | |
2f77fc4b | 2545 | default: |
f73fabfd | 2546 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2547 | goto error; |
2548 | } | |
2549 | ||
f73fabfd | 2550 | return nb_event; |
2f77fc4b DG |
2551 | |
2552 | error: | |
f73fabfd DG |
2553 | /* Return negative value to differentiate return code */ |
2554 | return -ret; | |
2f77fc4b DG |
2555 | } |
2556 | ||
2557 | /* | |
2558 | * Using the session list, filled a lttng_session array to send back to the | |
2559 | * client for session listing. | |
2560 | * | |
2561 | * The session list lock MUST be acquired before calling this function. Use | |
2562 | * session_lock_list() and session_unlock_list(). | |
2563 | */ | |
2564 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2565 | gid_t gid) | |
2566 | { | |
2567 | int ret; | |
2568 | unsigned int i = 0; | |
2569 | struct ltt_session *session; | |
2570 | struct ltt_session_list *list = session_get_list(); | |
2571 | ||
2572 | DBG("Getting all available session for UID %d GID %d", | |
2573 | uid, gid); | |
2574 | /* | |
2575 | * Iterate over session list and append data after the control struct in | |
2576 | * the buffer. | |
2577 | */ | |
2578 | cds_list_for_each_entry(session, &list->head, list) { | |
2579 | /* | |
2580 | * Only list the sessions the user can control. | |
2581 | */ | |
2582 | if (!session_access_ok(session, uid, gid)) { | |
2583 | continue; | |
2584 | } | |
2585 | ||
2586 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2587 | struct ltt_ust_session *usess = session->ust_session; | |
2588 | ||
2589 | if (session->consumer->type == CONSUMER_DST_NET || | |
2590 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2591 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2592 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2593 | sizeof(sessions[i].path), session); |
2f77fc4b | 2594 | } else { |
dec56f6c | 2595 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2596 | session->consumer->dst.trace_path); |
2597 | } | |
2598 | if (ret < 0) { | |
2599 | PERROR("snprintf session path"); | |
2600 | continue; | |
2601 | } | |
2602 | ||
2603 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2604 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2605 | sessions[i].enabled = session->active; |
2cbf8fed | 2606 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2607 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2608 | i++; |
2609 | } | |
2610 | } | |
2611 | ||
806e2684 | 2612 | /* |
6d805429 | 2613 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2614 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2615 | */ |
6d805429 | 2616 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2617 | { |
2618 | int ret; | |
2619 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2620 | struct ltt_ust_session *usess = session->ust_session; | |
2621 | ||
2622 | assert(session); | |
2623 | ||
2624 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2625 | if (session->active) { |
806e2684 DG |
2626 | ret = LTTNG_ERR_SESSION_STARTED; |
2627 | goto error; | |
3a89d11a DG |
2628 | } else { |
2629 | /* | |
2630 | * If stopped, just make sure we've started before else the above call | |
2631 | * will always send that there is data pending. | |
2632 | * | |
2633 | * The consumer assumes that when the data pending command is received, | |
2634 | * the trace has been started before or else no output data is written | |
2635 | * by the streams which is a condition for data pending. So, this is | |
2636 | * *VERY* important that we don't ask the consumer before a start | |
2637 | * trace. | |
2638 | */ | |
8382cf6f | 2639 | if (!session->has_been_started) { |
3a89d11a DG |
2640 | ret = 0; |
2641 | goto error; | |
2642 | } | |
806e2684 DG |
2643 | } |
2644 | ||
2645 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2646 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2647 | if (ret == 1) { | |
806e2684 DG |
2648 | /* Data is still being extracted for the kernel. */ |
2649 | goto error; | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | if (usess && usess->consumer) { | |
6d805429 DG |
2654 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2655 | if (ret == 1) { | |
806e2684 DG |
2656 | /* Data is still being extracted for the kernel. */ |
2657 | goto error; | |
2658 | } | |
2659 | } | |
2660 | ||
2661 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2662 | ret = 0; |
806e2684 DG |
2663 | |
2664 | error: | |
2665 | return ret; | |
2666 | } | |
2667 | ||
6dc3064a DG |
2668 | /* |
2669 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2670 | * | |
2671 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2672 | */ | |
2673 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2674 | struct lttng_snapshot_output *output, uint32_t *id) | |
2675 | { | |
2676 | int ret; | |
2677 | struct snapshot_output *new_output; | |
2678 | ||
2679 | assert(session); | |
2680 | assert(output); | |
2681 | ||
2682 | DBG("Cmd snapshot add output for session %s", session->name); | |
2683 | ||
2684 | /* | |
d3f14b8a MD |
2685 | * Permission denied to create an output if the session is not |
2686 | * set in no output mode. | |
6dc3064a DG |
2687 | */ |
2688 | if (session->output_traces) { | |
2689 | ret = LTTNG_ERR_EPERM; | |
2690 | goto error; | |
2691 | } | |
2692 | ||
2693 | /* Only one output is allowed until we have the "tee" feature. */ | |
2694 | if (session->snapshot.nb_output == 1) { | |
2695 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2696 | goto error; | |
2697 | } | |
2698 | ||
2699 | new_output = snapshot_output_alloc(); | |
2700 | if (!new_output) { | |
2701 | ret = LTTNG_ERR_NOMEM; | |
2702 | goto error; | |
2703 | } | |
2704 | ||
2705 | ret = snapshot_output_init(output->max_size, output->name, | |
2706 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2707 | &session->snapshot); | |
2708 | if (ret < 0) { | |
2709 | if (ret == -ENOMEM) { | |
2710 | ret = LTTNG_ERR_NOMEM; | |
2711 | } else { | |
2712 | ret = LTTNG_ERR_INVALID; | |
2713 | } | |
2714 | goto free_error; | |
2715 | } | |
2716 | ||
6dc3064a DG |
2717 | rcu_read_lock(); |
2718 | snapshot_add_output(&session->snapshot, new_output); | |
2719 | if (id) { | |
2720 | *id = new_output->id; | |
2721 | } | |
2722 | rcu_read_unlock(); | |
2723 | ||
2724 | return LTTNG_OK; | |
2725 | ||
2726 | free_error: | |
2727 | snapshot_output_destroy(new_output); | |
2728 | error: | |
2729 | return ret; | |
2730 | } | |
2731 | ||
2732 | /* | |
2733 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2734 | * | |
2735 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2736 | */ | |
2737 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2738 | struct lttng_snapshot_output *output) | |
2739 | { | |
2740 | int ret; | |
eb240553 | 2741 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2742 | |
2743 | assert(session); | |
2744 | assert(output); | |
2745 | ||
6dc3064a DG |
2746 | rcu_read_lock(); |
2747 | ||
2748 | /* | |
d3f14b8a MD |
2749 | * Permission denied to create an output if the session is not |
2750 | * set in no output mode. | |
6dc3064a DG |
2751 | */ |
2752 | if (session->output_traces) { | |
2753 | ret = LTTNG_ERR_EPERM; | |
2754 | goto error; | |
2755 | } | |
2756 | ||
eb240553 DG |
2757 | if (output->id) { |
2758 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2759 | session->name); | |
2760 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2761 | } else if (*output->name != '\0') { | |
2762 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2763 | session->name); | |
2764 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2765 | } | |
6dc3064a DG |
2766 | if (!sout) { |
2767 | ret = LTTNG_ERR_INVALID; | |
2768 | goto error; | |
2769 | } | |
2770 | ||
2771 | snapshot_delete_output(&session->snapshot, sout); | |
2772 | snapshot_output_destroy(sout); | |
2773 | ret = LTTNG_OK; | |
2774 | ||
2775 | error: | |
2776 | rcu_read_unlock(); | |
2777 | return ret; | |
2778 | } | |
2779 | ||
2780 | /* | |
2781 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2782 | * | |
2783 | * If no output is available, outputs is untouched and 0 is returned. | |
2784 | * | |
2785 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2786 | */ | |
2787 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2788 | struct lttng_snapshot_output **outputs) | |
2789 | { | |
2790 | int ret, idx = 0; | |
377b9cab | 2791 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
2792 | struct lttng_ht_iter iter; |
2793 | struct snapshot_output *output; | |
2794 | ||
2795 | assert(session); | |
2796 | assert(outputs); | |
2797 | ||
2798 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2799 | ||
2800 | /* | |
d3f14b8a MD |
2801 | * Permission denied to create an output if the session is not |
2802 | * set in no output mode. | |
6dc3064a DG |
2803 | */ |
2804 | if (session->output_traces) { | |
377b9cab | 2805 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
2806 | goto error; |
2807 | } | |
2808 | ||
2809 | if (session->snapshot.nb_output == 0) { | |
2810 | ret = 0; | |
2811 | goto error; | |
2812 | } | |
2813 | ||
2814 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2815 | if (!list) { | |
377b9cab | 2816 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
2817 | goto error; |
2818 | } | |
2819 | ||
2820 | /* Copy list from session to the new list object. */ | |
377b9cab | 2821 | rcu_read_lock(); |
6dc3064a DG |
2822 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
2823 | output, node.node) { | |
2824 | assert(output->consumer); | |
2825 | list[idx].id = output->id; | |
2826 | list[idx].max_size = output->max_size; | |
2827 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2828 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2829 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2830 | sizeof(list[idx].ctrl_url)); | |
2831 | } else { | |
2832 | /* Control URI. */ | |
2833 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2834 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2835 | if (ret < 0) { | |
377b9cab JG |
2836 | ret = -LTTNG_ERR_NOMEM; |
2837 | goto error; | |
6dc3064a DG |
2838 | } |
2839 | ||
2840 | /* Data URI. */ | |
2841 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2842 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2843 | if (ret < 0) { | |
377b9cab JG |
2844 | ret = -LTTNG_ERR_NOMEM; |
2845 | goto error; | |
6dc3064a DG |
2846 | } |
2847 | } | |
2848 | idx++; | |
2849 | } | |
2850 | ||
2851 | *outputs = list; | |
377b9cab JG |
2852 | list = NULL; |
2853 | ret = session->snapshot.nb_output; | |
6dc3064a | 2854 | error: |
377b9cab JG |
2855 | free(list); |
2856 | rcu_read_unlock(); | |
2857 | return ret; | |
6dc3064a DG |
2858 | } |
2859 | ||
2860 | /* | |
2861 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2862 | * snapshot output is *not* set with a remote destination. | |
2863 | * | |
a934f4af | 2864 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2865 | */ |
2866 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2867 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2868 | { | |
a934f4af | 2869 | int ret = LTTNG_OK; |
6dc3064a DG |
2870 | struct lttng_ht_iter iter; |
2871 | struct consumer_socket *socket; | |
2872 | ||
2873 | assert(consumer); | |
2874 | assert(snap_output); | |
2875 | assert(session); | |
2876 | ||
2877 | DBG2("Set relayd object from snapshot output"); | |
2878 | ||
2879 | /* Ignore if snapshot consumer output is not network. */ | |
2880 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2881 | goto error; | |
2882 | } | |
2883 | ||
2884 | /* | |
2885 | * For each consumer socket, create and send the relayd object of the | |
2886 | * snapshot output. | |
2887 | */ | |
2888 | rcu_read_lock(); | |
5eecee74 DG |
2889 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2890 | socket, node.node) { | |
6dc3064a | 2891 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2892 | snap_output->consumer, socket, |
2893 | session->name, session->hostname, | |
2894 | session->live_timer); | |
a934f4af | 2895 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2896 | rcu_read_unlock(); |
2897 | goto error; | |
2898 | } | |
2899 | } | |
2900 | rcu_read_unlock(); | |
2901 | ||
2902 | error: | |
2903 | return ret; | |
2904 | } | |
2905 | ||
2906 | /* | |
2907 | * Record a kernel snapshot. | |
2908 | * | |
fac41e72 | 2909 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
2910 | */ |
2911 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 2912 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2913 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2914 | { |
2915 | int ret; | |
2916 | ||
2917 | assert(ksess); | |
2918 | assert(output); | |
2919 | assert(session); | |
2920 | ||
10a50311 JD |
2921 | /* Get the datetime for the snapshot output directory. */ |
2922 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2923 | sizeof(output->datetime)); | |
2924 | if (!ret) { | |
a934f4af | 2925 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2926 | goto error; |
2927 | } | |
2928 | ||
af706bb7 DG |
2929 | /* |
2930 | * Copy kernel session sockets so we can communicate with the right | |
2931 | * consumer for the snapshot record command. | |
2932 | */ | |
2933 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2934 | if (ret < 0) { | |
a934f4af | 2935 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2936 | goto error; |
6dc3064a DG |
2937 | } |
2938 | ||
2939 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2940 | if (ret != LTTNG_OK) { |
af706bb7 | 2941 | goto error_snapshot; |
6dc3064a DG |
2942 | } |
2943 | ||
68808f4e | 2944 | ret = kernel_snapshot_record(ksess, output, wait, max_stream_size); |
2a06df8d | 2945 | if (ret != LTTNG_OK) { |
af706bb7 | 2946 | goto error_snapshot; |
6dc3064a DG |
2947 | } |
2948 | ||
a934f4af DG |
2949 | ret = LTTNG_OK; |
2950 | ||
af706bb7 DG |
2951 | error_snapshot: |
2952 | /* Clean up copied sockets so this output can use some other later on. */ | |
2953 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2954 | error: |
2955 | return ret; | |
2956 | } | |
2957 | ||
2958 | /* | |
2959 | * Record a UST snapshot. | |
2960 | * | |
a934f4af | 2961 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2962 | */ |
2963 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 2964 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2965 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2966 | { |
2967 | int ret; | |
2968 | ||
2969 | assert(usess); | |
2970 | assert(output); | |
2971 | assert(session); | |
2972 | ||
10a50311 JD |
2973 | /* Get the datetime for the snapshot output directory. */ |
2974 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2975 | sizeof(output->datetime)); | |
2976 | if (!ret) { | |
a934f4af | 2977 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2978 | goto error; |
2979 | } | |
2980 | ||
af706bb7 | 2981 | /* |
d3f14b8a | 2982 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2983 | * consumer for the snapshot record command. |
2984 | */ | |
2985 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
2986 | if (ret < 0) { | |
a934f4af | 2987 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2988 | goto error; |
6dc3064a DG |
2989 | } |
2990 | ||
2991 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 2992 | if (ret != LTTNG_OK) { |
af706bb7 | 2993 | goto error_snapshot; |
6dc3064a DG |
2994 | } |
2995 | ||
68808f4e | 2996 | ret = ust_app_snapshot_record(usess, output, wait, max_stream_size); |
6dc3064a | 2997 | if (ret < 0) { |
7badf927 DG |
2998 | switch (-ret) { |
2999 | case EINVAL: | |
a934f4af | 3000 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3001 | break; |
3002 | case ENODATA: | |
3003 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3004 | break; | |
3005 | default: | |
3006 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3007 | break; | |
5c786ded | 3008 | } |
af706bb7 | 3009 | goto error_snapshot; |
6dc3064a DG |
3010 | } |
3011 | ||
a934f4af DG |
3012 | ret = LTTNG_OK; |
3013 | ||
af706bb7 DG |
3014 | error_snapshot: |
3015 | /* Clean up copied sockets so this output can use some other later on. */ | |
3016 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3017 | error: |
3018 | return ret; | |
3019 | } | |
3020 | ||
68808f4e DG |
3021 | /* |
3022 | * Return the biggest subbuffer size of all channels in the given session. | |
3023 | */ | |
3024 | static uint64_t get_session_max_subbuf_size(struct ltt_session *session) | |
3025 | { | |
3026 | uint64_t max_size = 0; | |
3027 | ||
3028 | assert(session); | |
3029 | ||
3030 | if (session->kernel_session) { | |
3031 | struct ltt_kernel_channel *chan; | |
3032 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3033 | ||
3034 | /* | |
3035 | * For each channel, add to the max size the size of each subbuffer | |
3036 | * multiplied by their sized. | |
3037 | */ | |
3038 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { | |
3039 | if (chan->channel->attr.subbuf_size > max_size) { | |
3040 | max_size = chan->channel->attr.subbuf_size; | |
3041 | } | |
3042 | } | |
3043 | } | |
3044 | ||
3045 | if (session->ust_session) { | |
3046 | struct lttng_ht_iter iter; | |
3047 | struct ltt_ust_channel *uchan; | |
3048 | struct ltt_ust_session *usess = session->ust_session; | |
3049 | ||
7756a65d | 3050 | rcu_read_lock(); |
68808f4e DG |
3051 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
3052 | uchan, node.node) { | |
3053 | if (uchan->attr.subbuf_size > max_size) { | |
3054 | max_size = uchan->attr.subbuf_size; | |
3055 | } | |
3056 | } | |
7756a65d | 3057 | rcu_read_unlock(); |
68808f4e DG |
3058 | } |
3059 | ||
3060 | return max_size; | |
3061 | } | |
3062 | ||
5c786ded JD |
3063 | /* |
3064 | * Returns the total number of streams for a session or a negative value | |
3065 | * on error. | |
3066 | */ | |
68808f4e | 3067 | static unsigned int get_session_nb_streams(struct ltt_session *session) |
5c786ded JD |
3068 | { |
3069 | unsigned int total_streams = 0; | |
3070 | ||
3071 | if (session->kernel_session) { | |
3072 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3073 | ||
3074 | total_streams += ksess->stream_count_global; | |
3075 | } | |
3076 | ||
3077 | if (session->ust_session) { | |
3078 | struct ltt_ust_session *usess = session->ust_session; | |
3079 | ||
3080 | total_streams += ust_app_get_nb_stream(usess); | |
3081 | } | |
3082 | ||
3083 | return total_streams; | |
3084 | } | |
3085 | ||
6dc3064a DG |
3086 | /* |
3087 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3088 | * | |
3089 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3090 | * complete before returning. | |
3091 | * | |
3092 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3093 | */ | |
3094 | int cmd_snapshot_record(struct ltt_session *session, | |
3095 | struct lttng_snapshot_output *output, int wait) | |
3096 | { | |
3097 | int ret = LTTNG_OK; | |
e1986656 DG |
3098 | unsigned int use_tmp_output = 0; |
3099 | struct snapshot_output tmp_output; | |
1bfe7328 | 3100 | unsigned int nb_streams, snapshot_success = 0; |
68808f4e | 3101 | uint64_t session_max_size = 0, max_stream_size = 0; |
6dc3064a DG |
3102 | |
3103 | assert(session); | |
ba45d9f0 | 3104 | assert(output); |
6dc3064a DG |
3105 | |
3106 | DBG("Cmd snapshot record for session %s", session->name); | |
3107 | ||
3108 | /* | |
d3f14b8a MD |
3109 | * Permission denied to create an output if the session is not |
3110 | * set in no output mode. | |
6dc3064a DG |
3111 | */ |
3112 | if (session->output_traces) { | |
3113 | ret = LTTNG_ERR_EPERM; | |
3114 | goto error; | |
3115 | } | |
3116 | ||
3117 | /* The session needs to be started at least once. */ | |
8382cf6f | 3118 | if (!session->has_been_started) { |
6dc3064a DG |
3119 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3120 | goto error; | |
3121 | } | |
3122 | ||
3123 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3124 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3125 | ret = snapshot_output_init(output->max_size, output->name, |
3126 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3127 | &tmp_output, NULL); |
6dc3064a DG |
3128 | if (ret < 0) { |
3129 | if (ret == -ENOMEM) { | |
3130 | ret = LTTNG_ERR_NOMEM; | |
3131 | } else { | |
3132 | ret = LTTNG_ERR_INVALID; | |
3133 | } | |
3134 | goto error; | |
3135 | } | |
1bfe7328 DG |
3136 | /* Use the global session count for the temporary snapshot. */ |
3137 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3138 | use_tmp_output = 1; |
6dc3064a DG |
3139 | } |
3140 | ||
5c786ded | 3141 | /* |
68808f4e DG |
3142 | * Get the session maximum size for a snapshot meaning it will compute the |
3143 | * size of all streams from all domain. | |
3144 | */ | |
3145 | max_stream_size = get_session_max_subbuf_size(session); | |
3146 | ||
3147 | nb_streams = get_session_nb_streams(session); | |
3148 | if (nb_streams) { | |
3149 | /* | |
3150 | * The maximum size of the snapshot is the number of streams multiplied | |
3151 | * by the biggest subbuf size of all channels in a session which is the | |
3152 | * maximum stream size available for each stream. The session max size | |
3153 | * is now checked against the snapshot max size value given by the user | |
3154 | * and if lower, an error is returned. | |
3155 | */ | |
3156 | session_max_size = max_stream_size * nb_streams; | |
3157 | } | |
3158 | ||
3159 | DBG3("Snapshot max size is %" PRIu64 " for max stream size of %" PRIu64, | |
3160 | session_max_size, max_stream_size); | |
3161 | ||
3162 | /* | |
3163 | * If we use a temporary output, check right away if the max size fits else | |
3164 | * for each output the max size will be checked. | |
5c786ded | 3165 | */ |
68808f4e DG |
3166 | if (use_tmp_output && |
3167 | (tmp_output.max_size != 0 && | |
3168 | tmp_output.max_size < session_max_size)) { | |
3169 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3170 | goto error; | |
3171 | } | |
5c786ded | 3172 | |
6dc3064a DG |
3173 | if (session->kernel_session) { |
3174 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3175 | ||
e1986656 DG |
3176 | if (use_tmp_output) { |
3177 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
68808f4e | 3178 | wait, max_stream_size); |
a934f4af | 3179 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3180 | goto error; |
3181 | } | |
1bfe7328 | 3182 | snapshot_success = 1; |
6dc3064a DG |
3183 | } else { |
3184 | struct snapshot_output *sout; | |
3185 | struct lttng_ht_iter iter; | |
3186 | ||
3187 | rcu_read_lock(); | |
3188 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3189 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3190 | /* |
3191 | * Make a local copy of the output and assign the possible | |
3192 | * temporary value given by the caller. | |
3193 | */ | |
3194 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3195 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3196 | ||
3197 | /* Use temporary max size. */ | |
3198 | if (output->max_size != (uint64_t) -1ULL) { | |
3199 | tmp_output.max_size = output->max_size; | |
3200 | } | |
3201 | ||
68808f4e DG |
3202 | if (tmp_output.max_size != 0 && |
3203 | tmp_output.max_size < session_max_size) { | |
3204 | rcu_read_unlock(); | |
3205 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3206 | goto error; | |
3207 | } | |
3208 | ||
e1986656 DG |
3209 | /* Use temporary name. */ |
3210 | if (*output->name != '\0') { | |
3211 | strncpy(tmp_output.name, output->name, | |
3212 | sizeof(tmp_output.name)); | |
3213 | } | |
3214 | ||
1bfe7328 DG |
3215 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3216 | ||
e1986656 | 3217 | ret = record_kernel_snapshot(ksess, &tmp_output, |
68808f4e | 3218 | session, wait, max_stream_size); |
a934f4af | 3219 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3220 | rcu_read_unlock(); |
3221 | goto error; | |
3222 | } | |
1bfe7328 | 3223 | snapshot_success = 1; |
6dc3064a DG |
3224 | } |
3225 | rcu_read_unlock(); | |
3226 | } | |
3227 | } | |
3228 | ||
3229 | if (session->ust_session) { | |
3230 | struct ltt_ust_session *usess = session->ust_session; | |
3231 | ||
e1986656 DG |
3232 | if (use_tmp_output) { |
3233 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
68808f4e | 3234 | wait, max_stream_size); |
a934f4af | 3235 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3236 | goto error; |
3237 | } | |
1bfe7328 | 3238 | snapshot_success = 1; |
6dc3064a DG |
3239 | } else { |
3240 | struct snapshot_output *sout; | |
3241 | struct lttng_ht_iter iter; | |
3242 | ||
3243 | rcu_read_lock(); | |
3244 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3245 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3246 | /* |
3247 | * Make a local copy of the output and assign the possible | |
3248 | * temporary value given by the caller. | |
3249 | */ | |
3250 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3251 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3252 | ||
e1986656 DG |
3253 | /* Use temporary max size. */ |
3254 | if (output->max_size != (uint64_t) -1ULL) { | |
3255 | tmp_output.max_size = output->max_size; | |
3256 | } | |
3257 | ||
68808f4e DG |
3258 | if (tmp_output.max_size != 0 && |
3259 | tmp_output.max_size < session_max_size) { | |
3260 | rcu_read_unlock(); | |
3261 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3262 | goto error; | |
3263 | } | |
3264 | ||
e1986656 DG |
3265 | /* Use temporary name. */ |
3266 | if (*output->name != '\0') { | |
3267 | strncpy(tmp_output.name, output->name, | |
3268 | sizeof(tmp_output.name)); | |
3269 | } | |
3270 | ||
1bfe7328 DG |
3271 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3272 | ||
e1986656 | 3273 | ret = record_ust_snapshot(usess, &tmp_output, session, |
68808f4e | 3274 | wait, max_stream_size); |
a934f4af | 3275 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3276 | rcu_read_unlock(); |
3277 | goto error; | |
3278 | } | |
1bfe7328 | 3279 | snapshot_success = 1; |
6dc3064a DG |
3280 | } |
3281 | rcu_read_unlock(); | |
3282 | } | |
3283 | } | |
3284 | ||
1bfe7328 DG |
3285 | if (snapshot_success) { |
3286 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3287 | } else { |
3288 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3289 | } |
3290 | ||
6dc3064a | 3291 | error: |
6dc3064a DG |
3292 | return ret; |
3293 | } | |
3294 | ||
2f77fc4b DG |
3295 | /* |
3296 | * Init command subsystem. | |
3297 | */ | |
3298 | void cmd_init(void) | |
3299 | { | |
3300 | /* | |
d88aee68 DG |
3301 | * Set network sequence index to 1 for streams to match a relayd |
3302 | * socket on the consumer side. | |
2f77fc4b | 3303 | */ |
d88aee68 DG |
3304 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3305 | relayd_net_seq_idx = 1; | |
3306 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3307 | |
3308 | DBG("Command subsystem initialized"); | |
3309 | } |